docs: add lambdatest to sponsors

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

.all-contributorsrc

@@ -721,6 +721,42 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "edh649",
+      "name": "Ed Hanton",
+      "avatar_url": "https://avatars.githubusercontent.com/u/527604?v=4",
+      "profile": "https://github.com/edh649",
+      "contributions": [
+        "doc"
+      ]
+    },
+    {
+      "login": "gurdiga",
+      "name": "Vlad GURDIGA",
+      "avatar_url": "https://avatars.githubusercontent.com/u/53922?v=4",
+      "profile": "https://gurdiga.com",
+      "contributions": [
+        "doc"
+      ]
+    },
+    {
+      "login": "StreakingMan",
+      "name": "裸奔狂甩丁丁",
+      "avatar_url": "https://avatars.githubusercontent.com/u/30397306?v=4",
+      "profile": "https://www.streakingman.com",
+      "contributions": [
+        "doc"
+      ]
+    },
+    {
+      "login": "skynetigor",
+      "name": "Ihor Panasiuk",
+      "avatar_url": "https://avatars.githubusercontent.com/u/20903171?v=4",
+      "profile": "https://github.com/skynetigor",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

.github/workflows/build.yml

@@ -28,13 +28,13 @@ jobs:
       - name: Build
         run: npm run build
       - name: Archive artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: dist-${{ inputs.os }}
           path: dist
       - name: Archive npm failure logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
-          name: npm-logs
+          name: npm-logs-${{ inputs.os }}
           path: ~/.npm/_logs

.github/workflows/coverage.yml

@@ -22,7 +22,7 @@ jobs:
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
       - name: Archive npm failure logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: npm-logs

.github/workflows/docs.yml

@@ -24,7 +24,7 @@ jobs:
           branch: gh-pages
           folder: docs/public
       - name: Archive npm failure logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: npm-logs

.github/workflows/lint.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Lint
         run: npm run lint
       - name: Archive npm failure logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: npm-logs

.github/workflows/performance.yml

@@ -19,14 +19,14 @@ jobs:
         with:
           node-version: '20'
       - name: Download artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: dist-${{ inputs.os }}
           path: dist
       - name: Check Performance
         run: npm run perf:diff
       - name: Archive npm failure logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: npm-logs

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: '14'
+          node-version: '22'
       - name: Install Dependencies
         run: npm ci
       - name: Release
@@ -26,7 +26,7 @@ jobs:
             npx semantic-release --dry-run
           fi
       - name: Archive npm failure logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: npm-logs

.github/workflows/test.yml

@@ -14,13 +14,13 @@ jobs:
             node-versoin: 22
           - os: ubuntu-latest
             timezone: Etc/GMT
+            node-version: 20
+          - os: ubuntu-latest
+            timezone: Asia/Shanghai
+            node-version: 18
+          - os: ubuntu-latest
+            timezone: Asia/Shanghai
             node-version: 16
-          - os: ubuntu-latest
-            timezone: Asia/Shanghai
-            node-version: 15
-          - os: ubuntu-latest
-            timezone: Asia/Shanghai
-            node-version: 14
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
@@ -34,17 +34,17 @@ jobs:
       - name: Install dependencies
         run: npm ci
       - name: Download artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: dist-${{ matrix.os }}
           path: dist
       - name: Run Test
         run: TZ=${{ matrix.timezone }} npm test
       - name: Archive npm failure logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
-          name: npm-logs
+          name: test-npm-logs-${{ matrix.os }}-${{ matrix.node-version }}
           path: ~/.npm/_logs
   demo:
     name: Demo Check
@@ -59,15 +59,15 @@ jobs:
         with:
           node-version: 22
       - name: Download artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: dist-ubuntu-latest
           path: dist
       - name: Run Demo Test
         run: npm run test:demo
       - name: Archive npm failure logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
-          name: npm-logs
+          name: demo-npm-logs
           path: ~/.npm/_logs

CHANGELOG.md

@@ -1,3 +1,43 @@
+# [10.23.0](https://github.com/harttle/liquidjs/compare/v10.22.0...v10.23.0) (2025-10-23)
+
+
+### Features
+
+* Export specific tokens as types ([#824](https://github.com/harttle/liquidjs/issues/824)) ([4f7d2fd](https://github.com/harttle/liquidjs/commit/4f7d2fd84a8884e1009b13346d331a99b9721149))
+
+# [10.22.0](https://github.com/harttle/liquidjs/compare/v10.21.1...v10.22.0) (2025-10-06)
+
+
+### Bug Fixes
+
+* math filters coerce invalid string to 0, [#813](https://github.com/harttle/liquidjs/issues/813) ([#819](https://github.com/harttle/liquidjs/issues/819)) ([e8e502c](https://github.com/harttle/liquidjs/commit/e8e502c5854c9649bf7611a671a068dc260011d1))
+
+
+### Features
+
+* allow context access in liquidMethodMissing, [#808](https://github.com/harttle/liquidjs/issues/808) ([#820](https://github.com/harttle/liquidjs/issues/820)) ([e551288](https://github.com/harttle/liquidjs/commit/e55128850e507687f9d85a012fc3a72ac2550f3b))
+
+## [10.21.1](https://github.com/harttle/liquidjs/compare/v10.21.0...v10.21.1) (2025-05-14)
+
+
+### Bug Fixes
+
+* block.super with strictVariables, [#806](https://github.com/harttle/liquidjs/issues/806) ([#807](https://github.com/harttle/liquidjs/issues/807)) ([025c40f](https://github.com/harttle/liquidjs/commit/025c40f0f2f13efa62193c61d2fa56943917ac3c))
+
+# [10.21.0](https://github.com/harttle/liquidjs/compare/v10.20.3...v10.21.0) (2025-02-23)
+
+
+### Features
+
+* add find_index, has, and reject filters ([#799](https://github.com/harttle/liquidjs/issues/799)) ([0deb93e](https://github.com/harttle/liquidjs/commit/0deb93eeae4f530901e9a7d099bcc47207ad7385))
+
+## [10.20.3](https://github.com/harttle/liquidjs/compare/v10.20.2...v10.20.3) (2025-02-09)
+
+
+### Bug Fixes
+
+* empty tagToken.args since 10.20.0, fixes [#796](https://github.com/harttle/liquidjs/issues/796) ([38a0f51](https://github.com/harttle/liquidjs/commit/38a0f510b0a14baf35a368e9f07b536253394d06))
+
 ## [10.20.2](https://github.com/harttle/liquidjs/compare/v10.20.1...v10.20.2) (2025-01-19)
 
 

README.md

@@ -53,6 +53,7 @@ For more details, refer to the [Setup Guide][setup].
 ## Who's Using LiquidJS?
 
 - [Eleventy](https://www.11ty.dev/): Eleventy, a simpler static site generator.
+- [Github Docs](https://github.com/github/docs): The open-source repo for docs.github.com.
 - [Opensense](https://www.opensense.com/): The smarter way to send email.
 - [Directus](https://docs.directus.io/): an instant REST+GraphQL API and intuitive no-code data collaboration app for any SQL database.
 - [Semgrep](https://github.com/returntocorp/semgrep): Lightweight static analysis for many languages.
@@ -71,33 +72,30 @@ Feel free to create a PR or contact me to add your use case into this list!
 If you personally love LiquidJS or it's benefiting your business, please consider financially support us via [GitHub Sponsors](https://github.com/sponsors/harttle). Special thanks to our sponsors!
 
 <!-- FINANCIAL-CONTRIBUTORS-BEGIN -->
-<table>
-  <tbody>
-    <tr>
-      <td align="center" valign="top" width="14.28%"><a href="https://www.opensense.com/"><img src="https://images.opencollective.com/opensense-inc/bf840ae/logo/256.png?height=100" width="100px;" alt="Opensense Inc."/><br /><sub><b>Opensense</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://www.11ty.dev/"><img src="https://avatars.githubusercontent.com/u/35147177?v=4&s=100" width="100px;" alt="Eleventy"/><br /><sub><b>Eleventy</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://about.me/peterdehaan"><img src="https://avatars2.githubusercontent.com/u/557895?v=4&s=100" width="100px;" alt="Peter deHaan"/><br /><sub><b>Peter deHaan</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://opencollective.com/touchless"><img src="https://images.opencollective.com/touchless/273bc74/logo/256.png?height=100" width="100px;" alt="Touchless"/><br /><sub><b>Touchless</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://www.dropkiq.com/"><img src="https://images.opencollective.com/1bertlol/43a8ea8/logo/256.png?height=100" width="100px;" alt="Adam Darrah"/><br /><sub><b>Dropkiq</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://dailycontributors.com/"><img src="https://images.opencollective.com/dailycontributors/3c2e057/logo/256.png?height=100&width=100" width="100px;" alt="Dailycontributors"/><br /><sub><b>Dailycontributors</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://github.com/coni2k"><img src="https://avatars0.githubusercontent.com/u/1284601?v=4&s=100" width="100px;" alt="coni2k"/><br /><sub><b>Serkan Holat</b></sub></a></td>
-    </tr>
-    <tr>
-      <td align="center" valign="top" width="14.28%"><a href="https://github.com/amit777"><img src="https://avatars0.githubusercontent.com/u/2703309?v=4&s=100" width="100px;" alt="amit777"/><br /><sub><b>amit777</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://opencollective.com/khaled-salem"><img src="https://images.opencollective.com/khaled-salem/avatar/256.png?height=256" width="100px;" alt="Khaled Salem"/><br /><sub><b>Khaled Salem</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://sentry.io/"><img src="https://avatars.githubusercontent.com/u/1396951?v=4&s=100" width="100px;" alt="Sentry"/><br /><sub><b>Sentry</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://www.checkoutblocks.com/"><img src="https://avatars.githubusercontent.com/u/114603307?v=4&s=100" width="100px;" alt="Checkout Blocks"/><br /><sub><b>Checkout Blocks</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://customer.io/"><img src="https://avatars.githubusercontent.com/u/1152079?v=4&s=100" width="100px;" alt="Customer IO"/><br /><sub><b>Customer IO</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://github.com/15fathoms"><img src="https://avatars.githubusercontent.com/u/79156039?v=4&s=100" width="100px;" alt="Emmanuel Cartelli"/><br /><sub><b>Emmanuel Cartelli</b></sub></a><br /></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://github.com/microsoft"><img src="https://avatars.githubusercontent.com/u/6154722?v=4&s=100" width="100px;" alt="Microsoft"/><br /><sub><b>Microsoft</b></sub></a><br /></td>
-    </tr>
-    <tr>
-      <td align="center" valign="top" width="14.28%"><a href="https://www.pakstyle.pk/"><img src="https://images.opencollective.com/pakstyle/2b81605/logo/256.png?height=100" width="100px;" alt="PakStyle.pk"/><br /><sub><b>PakStyle.pk</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://syntax.fm/"><img src="https://avatars.githubusercontent.com/u/130389858?v=4&s=100" width="100px;" alt="Syntax Podcast"/><br /><sub><b>Syntax Podcast</b></sub></a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://opencollective.com/cartelli-emmanuel"><img src="https://images.opencollective.com/cartelli-emmanuel/avatar/256.png?height=100" width="100px;" alt="Cartelli Emmanuel"/><br /><sub><b>Cartelli Emmanuel</b></sub></a></td>
-    </tr>
-  </tbody>
-</table>
+<p align="center" style="line-height: 2.5;">
+  <a href="https://www.11ty.dev/" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://avatars.githubusercontent.com/u/35147177?v=4&s=100" height="80" style="vertical-align: middle;" alt="Eleventy" title="Eleventy"/></a>
+  <a href="https://www.opensense.com/" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://images.opencollective.com/opensense-inc/bf840ae/logo/256.png?height=100" height="80" style="vertical-align: middle;" alt="Opensense Inc." title="Opensense"/></a>
+  <a href="https://github.com/microsoft" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://avatars.githubusercontent.com/u/6154722?v=4&s=100" height="80" style="vertical-align: middle;" alt="Microsoft" title="Microsoft"/></a>
+  <a href="https://sentry.io/" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://avatars.githubusercontent.com/u/1396951?v=4&s=100" height="80" style="vertical-align: middle;" alt="Sentry" title="Sentry"/></a>
+  <a href="https://www.checkoutblocks.com/" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://avatars.githubusercontent.com/u/114603307?v=4&s=100" height="80" style="vertical-align: middle;" alt="Checkout Blocks" title="Checkout Blocks"/></a>
+  <a href="https://customer.io/" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://avatars.githubusercontent.com/u/1152079?v=4&s=100" height="80" style="vertical-align: middle;" alt="Customer IO" title="Customer IO"/></a>
+  <a href="https://syntax.fm/" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://avatars.githubusercontent.com/u/130389858?v=4&s=100" height="80" style="vertical-align: middle;" alt="Syntax Podcast" title="Syntax Podcast"/></a>
+  <br/>
+  <a href="https://www.lambdatest.com/?utm_source=liquidjs&utm_medium=sponsor" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://www.lambdatest.com/blue-logo.png" width="240" style="vertical-align: middle;" alt="LambdaTest" title="LambdaTest"/></a>
+  <a href="https://chudovo.com/" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://images.opencollective.com/Chudovo/avatar/256.png?height=100" width="160" style="vertical-align: middle;background: white;padding: 8px 16px;" alt="Chudovo" title="Chudovo"/></a>
+  <a href="https://dailycontributors.com/" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://images.opencollective.com/dailycontributors/3c2e057/logo/256.png?height=50&width=100" width="120" style="vertical-align: middle;" alt="Dailycontributors" title="Dailycontributors"/></a>
+  <a href="https://www.pakstyle.pk/" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://images.opencollective.com/pakstyle/2b81605/logo/256.png?height=100" height="80" style="vertical-align: middle;" alt="PakStyle.pk" title="PakStyle.pk"/></a>
+  <a href="https://www.escorta.com/" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://images.opencollective.com/escortacom/avatar/256.png?height=100" height="45" style="vertical-align: middle;" alt="EscortA.com" title="EscortA.com"/></a>
+  <br/>
+  <a href="https://opencollective.com/touchless" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://images.opencollective.com/touchless/273bc74/logo/256.png?height=100" height="80" style="vertical-align: middle;" alt="Touchless" title="Touchless"/></a>
+  <a href="https://www.dropkiq.com/" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://images.opencollective.com/1bertlol/43a8ea8/logo/256.png?height=100" height="80" style="vertical-align: middle;" alt="Dropkiq" title="Dropkiq"/></a>
+  <a href="https://about.me/peterdehaan" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://avatars2.githubusercontent.com/u/557895?v=4&s=100" height="80" style="vertical-align: middle;" alt="Peter deHaan" title="Peter deHaan"/></a>
+  <a href="https://github.com/coni2k" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://avatars0.githubusercontent.com/u/1284601?v=4&s=100" height="80" style="vertical-align: middle;" alt="Serkan Holat" title="Serkan Holat"/></a>
+  <a href="https://github.com/amit777" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://avatars0.githubusercontent.com/u/2703309?v=4&s=100" height="80" style="vertical-align: middle;" alt="amit777" title="amit777"/></a>
+  <a href="https://opencollective.com/khaled-salem" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://images.opencollective.com/khaled-salem/avatar/256.png?height=256" height="80" style="vertical-align: middle;" alt="Khaled Salem" title="Khaled Salem"/></a>
+  <a href="https://github.com/15fathoms" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://avatars.githubusercontent.com/u/79156039?v=4&s=100" height="80" style="vertical-align: middle;" alt="Emmanuel Cartelli" title="Emmanuel Cartelli"/></a>
+  <a href="https://opencollective.com/cartelli-emmanuel" style="display: inline-block; vertical-align: middle; margin: 8px;"><img src="https://images.opencollective.com/cartelli-emmanuel/avatar/256.png?height=100" height="80" style="vertical-align: middle;" alt="Cartelli Emmanuel" title="Cartelli Emmanuel"/></a>
+</p>
 <!-- FINANCIAL-CONTRIBUTORS-END -->
 
 ## Contributors ✨
@@ -210,6 +208,10 @@ Want to contribute? see [Contribution Guidelines][contribution]. Thanks goes to
     </tr>
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://tovd.dev"><img src="https://avatars.githubusercontent.com/u/35376389?v=4?s=100" width="100px;" alt="Tim van Dam"/><br /><sub><b>Tim van Dam</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=timvandam" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/edh649"><img src="https://avatars.githubusercontent.com/u/527604?v=4?s=100" width="100px;" alt="Ed Hanton"/><br /><sub><b>Ed Hanton</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=edh649" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://gurdiga.com"><img src="https://avatars.githubusercontent.com/u/53922?v=4?s=100" width="100px;" alt="Vlad GURDIGA"/><br /><sub><b>Vlad GURDIGA</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=gurdiga" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://www.streakingman.com"><img src="https://avatars.githubusercontent.com/u/30397306?v=4?s=100" width="100px;" alt="裸奔狂甩丁丁"/><br /><sub><b>裸奔狂甩丁丁</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=StreakingMan" title="Documentation">📖</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://github.com/skynetigor"><img src="https://avatars.githubusercontent.com/u/20903171?v=4?s=100" width="100px;" alt="Ihor Panasiuk"/><br /><sub><b>Ihor Panasiuk</b></sub></a><br /><a href="https://github.com/harttle/liquidjs/commits?author=skynetigor" title="Code">💻</a></td>
     </tr>
   </tbody>
 </table>

bin/build-contributors.sh

@@ -20,7 +20,6 @@ awk '/ALL-CONTRIBUTORS-LIST:START/{flag=1;next}/ALL-CONTRIBUTORS-LIST:END/{flag=
 # create docs/themes/navy/layout/partial/financial-contributors.swig
 awk '/FINANCIAL-CONTRIBUTORS-BEGIN/{flag=1;next}/FINANCIAL-CONTRIBUTORS-END/{flag=0}flag' README.md | \
   sed 's/<br \/>.*<\/td>/<\/a><\/td>/g' | \
-  sed 's/width="[^"]*"//g' | \
   tr -d '\n' | \
   sed 's/<\/tr>\s*<tr>//g' \
   > docs/themes/navy/layout/partial/financial-contributors.swig

docs/_config.yml

@@ -30,8 +30,8 @@ prismjs:
   tab_replace: ""
 
 algolia:
-  applicationID: 0X19J927JZ
-  apiKey: 533161d821384919672e4ce8a39451b3
+  applicationID: QJ35YOZTU4
+  apiKey: 8c6cbb824b4c5023f0bb2ef29e228bef
   indexName: liquidjs
 twitter: harttleharttle
 github: harttle/liquidjs

docs/source/_data/sidebar.yml

@@ -51,10 +51,14 @@ filters:
   escape_once: escape_once.html
   find: find.html
   find_exp: find_exp.html
+  find_index: find_index.html
+  find_index_exp: find_index_exp.html
   first: first.html
   floor: floor.html
   group_by: group_by.html
   group_by_exp: group_by_exp.html
+  has: has.html
+  has_exp: has_exp.html
   inspect: inspect.html
   join: join.html
   json: json.html
@@ -72,6 +76,8 @@ filters:
   push: push.html
   prepend: prepend.html
   raw: raw.html
+  reject: reject.html
+  reject_exp: reject_exp.html
   remove: remove.html
   remove_first: remove_first.html
   remove_last: remove_last.html

docs/source/filters/find_index.md

@@ -0,0 +1,25 @@
+---
+title: find_index
+---
+
+{% since %}v10.21.0{% endsince %}
+
+Return the 0-based index of the first object in an array for which the queried attribute has the given value or return `nil` if no item in the array satisfies the given criteria. For the following `members` array:
+
+```javascript
+const members = [
+  { graduation_year: 2013, name: 'Jay' },
+  { graduation_year: 2014, name: 'John' },
+  { graduation_year: 2014, name: 'Jack' }
+]
+```
+
+Input
+```liquid
+{{ members | find_index: "graduation_year", 2014 | json }}
+```
+
+Output
+```text
+1
+```

docs/source/filters/find_index_exp.md

@@ -0,0 +1,25 @@
+---
+title: find_index_exp
+---
+
+{% since %}v10.21.0{% endsince %}
+
+Return the 0-based index of the first object in an array for which the given expression evaluates to true or return `nil` if no item in the array satisfies the evaluated expression.
+
+```javascript
+const members = [
+  { graduation_year: 2013, name: 'Jay' },
+  { graduation_year: 2014, name: 'John' },
+  { graduation_year: 2014, name: 'Jack' }
+]
+```
+
+Input
+```liquid
+{{ members | find_index_exp: "item", "item.graduation_year == 2014" | json }}
+```
+
+Output
+```text
+1
+```

docs/source/filters/has.md

@@ -0,0 +1,25 @@
+---
+title: has
+---
+
+{% since %}v10.21.0{% endsince %}
+
+Return `true` if the array includes an item for which the queried attribute has the given value or return `false` if no item in the array satisfies the given criteria. For the following `members` array:
+
+```javascript
+const members = [
+  { graduation_year: 2013, name: 'Jay' },
+  { graduation_year: 2014, name: 'John' },
+  { graduation_year: 2014, name: 'Jack' }
+]
+```
+
+Input
+```liquid
+{{ members | has: "graduation_year", 2014 | json }}
+```
+
+Output
+```text
+true
+```

docs/source/filters/has_exp.md

@@ -0,0 +1,25 @@
+---
+title: has_exp
+---
+
+{% since %}v10.21.0{% endsince %}
+
+Return `true` if an item exists in an array for which the given expression evaluates to true or return `false` if no item in the array satisfies the evaluated expression.
+
+```javascript
+const members = [
+  { graduation_year: 2013, name: 'Jay' },
+  { graduation_year: 2014, name: 'John' },
+  { graduation_year: 2014, name: 'Jack' }
+]
+```
+
+Input
+```liquid
+{{ members | has_exp: "item", "item.graduation_year == 2014" | json }}
+```
+
+Output
+```text
+true
+```

docs/source/filters/reject.md

@@ -0,0 +1,118 @@
+---
+title: reject
+---
+
+{% since %}v10.21.0{% endsince %}
+
+Creates an array excluding the objects with a given property value, or excluding [truthy][truthy] values by default when a property is not given.
+
+In this example, assume you have a list of products and you want to filter out kitchen products. Using `reject`, you can create an array excluding only the products that have a `"type"` of `"kitchen"`.
+
+Input
+```liquid
+All products:
+{% for product in products %}
+- {{ product.title }}
+{% endfor %}
+
+{% assign non_kitchen_products = products | reject: "type", "kitchen" %}
+
+Kitchen products:
+{% for product in non_kitchen_products %}
+- {{ product.title }}
+{% endfor %}
+```
+
+Output
+```text
+All products:
+- Vacuum
+- Spatula
+- Television
+- Garlic press
+
+Kitchen products:
+- Vacuum
+- Television
+```
+
+Say instead you have a list of products and you want to exclude taxable products. You can `reject` with a property name but no target value to reject all products with a [truthy][truthy] `"taxable"` value.
+
+Input
+```liquid
+All products:
+{% for product in products %}
+- {{ product.title }}
+{% endfor %}
+
+{% assign not_taxed_products = products | reject: "taxable" %}
+
+Available products:
+{% for product in not_taxed_products %}
+- {{ product.title }}
+{% endfor %}
+```
+
+Output
+```text
+All products:
+- Vacuum
+- Spatula
+- Television
+- Garlic press
+
+Available products:
+- Spatula
+- Television
+```
+
+Additionally, `property` can be any valid Liquid variable expression as used in output syntax, except that the scope of this expression is within each item. For the following `products` array:
+
+```javascript
+const products = [
+    { meta: { details: { class: 'A' } }, order: 1 },
+    { meta: { details: { class: 'B' } }, order: 2 },
+    { meta: { details: { class: 'B' } }, order: 3 }
+]
+```
+
+Input
+```liquid
+{% assign selected = products | reject: 'meta.details["class"]', "B" %}
+{% for item in selected -%}
+- {{ item.order }}
+{% endfor %}
+```
+
+Output
+```text
+- 1
+```
+
+## Jekyll style
+
+{% since %}v10.21.0{% endsince %}
+
+For Liquid users migrating from Jekyll, there's a `jekyllWhere` option to mimic the behavior of Jekyll's `where` filter. This option is set to `false` by default. When enabled, if `property` is an array, the target value is matched using `Array.includes` instead of `==`, which is particularly useful for excluding tags.
+
+```javascript
+const pages = [
+    { tags: ["cat", "food"], title: 'Cat Food' },
+    { tags: ["dog", "food"], title: 'Dog Food' },
+]
+```
+
+Input
+```liquid
+{% assign selected = pages | reject: 'tags', "cat" %}
+{% for item in selected -%}
+- {{ item.title }}
+{% endfor %}
+```
+
+Output
+```text
+Dog Food
+```
+
+[truthy]: ../tutorials/truthy-and-falsy.html

docs/source/filters/reject_exp.md

@@ -0,0 +1,37 @@
+---
+title: reject_exp
+---
+
+{% since %}v10.21.0{% endsince %}
+
+Select all the objects in an array where the expression is false. In this example, assume you have a list of products and you want to hide your kitchen products. Using `reject_exp`, you can create an array that omits only the products that have a `"type"` of `"kitchen"`.
+
+Input
+```liquid
+All products:
+{% for product in products %}
+- {{ product.title }}
+{% endfor %}
+
+{% assign non_kitchen_products = products | reject_exp: "item", "item.type == 'kitchen'" %}
+
+Kitchen products:
+{% for product in non_kitchen_products %}
+- {{ product.title }}
+{% endfor %}
+```
+
+Output
+```text
+All products:
+- Vacuum
+- Spatula
+- Television
+- Garlic press
+
+Kitchen products:
+- Vacuum
+- Television
+```
+
+[truthy]: ../tutorials/truthy-and-falsy.html

docs/source/filters/where.md

@@ -37,6 +37,7 @@ Kitchen products:
 ```
 
 Say instead you have a list of products and you only want to show those that are available to buy. You can `where` with a property name but no target value to include all products with a [truthy][truthy] `"available"` value.
+As a special case, the same will happen if the target value is given but evaluates to `undefined`.
 
 Input
 ```liquid
@@ -70,7 +71,6 @@ The `where` filter can also be used to find a single object in an array when com
 Input
 ```liquid
 {% assign new_shirt = products | where: "type", "shirt" | first %}
-
 Featured product: {{ new_shirt.title }}
 ```
 
@@ -105,9 +105,11 @@ Output
 
 ## Jekyll style
 
-{% since %}v10.19.0{% endsince %}
+{% since %}v10.21.0{% endsince %}
 
-For Liquid users migrating from Jekyll, there's a `jekyllWhere` option to mimic the behavior of Jekyll's `where` filter. This option is set to `false` by default. When enabled, if `property` is an array, the target value is matched using `Array.includes` instead of `==`, which is particularly useful for filtering tags.
+For Liquid users migrating from Jekyll, there's a `jekyllWhere` option to mimic the behavior of Jekyll's `where` filter. This option is set to `false` by default. When enabled, if `property` is an array, the target value is matched using `Array.includes` instead of `==`, which is particularly useful for filtering tags. Additionally, a target value of `undefined` is treated normally, entries matched are exactly those which are themselves `undefined`.
+
+This option affects other array selection filters as well, such as `reject` and `find`.
 
 ```javascript
 const pages = [

docs/source/sw.js

@@ -10,6 +10,7 @@ const urlsToCache = [
 ]
 const blackList = [
   /chrome-extension:/,
+  /algolia.net/,
   /google-analytics.com.*collect/
 ]
 

docs/source/tags/echo.md

@@ -4,7 +4,7 @@ title: Echo
 
 {% since %}v9.31.0{% endsince %}
 
-Outputs an expression in the rendered HTML. This is identical to wrapping an expression in `{{` and `}}`, but works inside liquid tags and supports filters.
+Outputs an expression in the rendered HTML. This is identical to wrapping an expression in <code>{{</code> and <code>}}</code>, but works inside liquid tags and supports filters.
 
 ## echo
 

docs/source/tutorials/contribution-guidelines.md

@@ -20,7 +20,11 @@ Getting started and building is described in [CONTRIBUTING.md](https://github.co
 
 ## Financial Support
 
-LiquidJS is Open Source and Free. To help it live and thrive, especially when LiquidJS is benefiting your business, please consider contribute on [GitHub Sponsors](https://github.com/sponsors/harttle) or [Open Collective][oc]. If I'm missing anything, find me via Twitter (harttleharttle) or email (harttleharttle at gmail), to add you into [the contributors table](https://github.com/harttle/liquidjs#contributors-).
+LiquidJS is Open Source and Free. To help it live and thrive, especially when LiquidJS is benefiting your business, please consider contribute on [GitHub Sponsors](https://github.com/sponsors/harttle) or [Open Collective][oc].
+
+I'll add all financial contributors into [README.md](https://github.com/harttle/liquidjs#financial-support) and it'll be also shown on https://liquidjs.com after next GitHub Actions build.
+
+If I'm missing anything or you observed it not working, please don't hesitate to file an issue or find me via email (harttleharttle at gmail).
 
 [oc]: https://opencollective.com/liquidjs/contribute/backer-10665/checkout
 [shopify/liquid]: https://shopify.github.io/liquid/

docs/source/tutorials/options.md

@@ -116,7 +116,7 @@ it defaults to false.  For example, when set to true, a blank string would evalu
 
 **preserveTimezones** is a boolean effects only literal timestamps. When set to `true`, all literal timestamps will remain the same when output. This is a parser option, so Date objects passed to LiquidJS as data will not be affected. Note that `preserveTimezones` has a higher priority than `timezoneOffset`.
 
-**dateFormat** is used to specify a default format to output dates. `%A, %B %-e, %Y at %-l:%M %P %z` will be used if not specified. For example, set `dateFormat: %Y-%m-%dT%H:%M:%S:%LZ` to output all dates in [JavaScript Date.toJson()][https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toJSON] format.
+**dateFormat** is used to specify a default format to output dates. `%A, %B %-e, %Y at %-l:%M %P %z` will be used if not specified. For example, set `dateFormat: %Y-%m-%dT%H:%M:%S:%LZ` to output all dates in [JavaScript Date.toJson()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toJSON) format.
 
 ## Trimming
 
@@ -146,7 +146,7 @@ Nonexistent tags always throw errors during parsing and this behavior cannot be
 
 ## Parameter Order
 
-Parameter orders are ignored by default, for ea `{% for i in (1..8) reversed limit:3 %}` will always perform `limit` before `reversed`, even if `reversed` occurs before `limit`. To make parameter order respected, set **orderedFilterParameters** to `true`. Its default value is `false`.
+Parameter orders are ignored by default, for example `{% for i in (1..8) reversed limit:3 %}` will always perform `limit` before `reversed`, even if `reversed` occurs before `limit`. To make parameter order respected, set **orderedFilterParameters** to `true`. Its default value is `false`.
 
 [liquid]: /api/classes/Liquid.html
 [caching]: ./caching.html

docs/source/tutorials/register-filters-tags.md

@@ -10,7 +10,7 @@ import { Value, TagToken, Context, Emitter, TopLevelToken } from 'liquidjs'
 
 engine.registerTag('upper', {
     parse: function(tagToken: TagToken, remainTokens: TopLevelToken[]) {
-        this.value = new Value(token.args, liquid)
+        this.value = new Value(tagToken.args, engine)
     },
     render: function*(ctx: Context) {
         const str = yield this.value.value(ctx); // 'alice'
@@ -80,4 +80,4 @@ function disabledFilter(name) {
     }
 }
 engine.registerFilter('plus', disabledFilter('plus'));
-```
+```

docs/source/zh-cn/tutorials/operators.md

@@ -16,6 +16,6 @@ LiquidJS 运算符非常简单也很特别，只支持两类运算符：
 
 ## 结合性
 
-逻辑运算符是又结合的，所以连续的逻辑运算时计算顺序是从右向左，参考 [Shopify][operator-order] 的文档。
+逻辑运算符是右结合的，所以连续的逻辑运算时计算顺序是从右向左，参考 [Shopify][operator-order] 的文档。
 
 [operator-order]: https://help.shopify.com/en/themes/liquid/basics/operators#order-of-operations

docs/themes/navy/layout/index.swig

@@ -1,5 +1,5 @@
 <header id="banner" class="wrapper">
-  <div class="inner">
+  <div class="inner inner-content">
     <h2 id="banner-title">{{ page.subtitle }}</h2>
     <div id="banner-start">
       <code id="banner-start-command">npm install liquidjs</code><a id="banner-start-link" href="./tutorials/setup.html"><i class="icon-arrow-right"></i></a>
@@ -9,7 +9,7 @@
 </header>
 <div id="intro-news-list">
   <div class="wrapper">
-    <div class="inner">
+    <div class="inner inner-content">
       <div id="intro-news-flex">
         {% for news in site.data.news %}
         <a href="{{news.url}}" class="intro-news-wrap">
@@ -23,7 +23,7 @@
 </div>
 <div id="content-wrap">
   <div class="wrapper">
-    <div class="inner">
+    <div class="inner inner-content">
       {{ page.content }}
       <div id="intro-cmd-wrap" class="highlight typescript"><pre><span class="line"><span class="keyword">import</span> { Liquid } <span class="keyword">from</span> <span class="string">'liquidjs'</span></span><br><span class="line"><span class="keyword">const</span> engine = <span class="keyword">new</span> Liquid()</span><br><span class="line"><span class="keyword">const</span> tpl = engine.parse(<span class="string">'Welcome to {% raw %}{{v}}{% endraw %}!'</span>)</span><br><span class="line">engine.render(tpl, {<span class="attr">v</span>: <span class="string">"Liquid"</span>}).then(<span class="built_in">console</span>.log)</span><br><span class="line"><span class="comment">// Outputs "Welcome to Liquid!"</span></span><br></pre></div>
       <div id="intro-get-started-wrap">
@@ -32,20 +32,9 @@
     </div>
   </div>
 </div>
-<div id="contributors-wrap">
-  <div class="wrapper">
-    <div class="inner">
-      <h3>{{__('index.contributors.title')}}</h3>
-      <p class="description">{{__('index.contributors.description')}}</p>
-      <div class="contributors">
-        {{ partial('partial/all-contributors') }}
-      </div>
-    </div>
-  </div>
-</div>
 <div id="sponsors-wrap">
   <div class="wrapper">
-    <div class="inner">
+    <div class="inner inner-content">
       <h3>{{__('index.sponsors.title')}}</h3>
       <p class="description">{{__('index.sponsors.description')}}</p>
       <div class="contributors">
@@ -54,3 +43,14 @@
     </div>
   </div>
 </div>
+<div id="contributors-wrap">
+  <div class="wrapper">
+    <div class="inner inner-content">
+      <h3>{{__('index.contributors.title')}}</h3>
+      <p class="description">{{__('index.contributors.description')}}</p>
+      <div class="contributors">
+        {{ partial('partial/all-contributors') }}
+      </div>
+    </div>
+  </div>
+</div>

docs/themes/navy/layout/partial/after_footer.swig

@@ -9,7 +9,8 @@
 <script>
 document.getElementById('search-input-wrap').classList.add('on');
 docsearch({
-apiKey: '01f36cc168657a26a385308b9e721bc6',
+appId: '{{ config.algolia.applicationID }}',
+apiKey: '{{ config.algolia.apiKey }}',
 indexName: 'liquidjs',
 inputSelector: '#search-input',
 debug: false

docs/themes/navy/source/css/_partial/base.styl

@@ -54,7 +54,11 @@ a
 
 .inner
   @media screen
-    padding: 0 gutter-width
+    margin: 0 gutter-width
+.inner.inner-content
+  margin: 0 32px
+  @media mq-tablet
+    margin: 0 48px
 
 #content-wrap
   background: var(--color-content-bg)

docs/themes/navy/source/css/_partial/index.styl

@@ -66,6 +66,10 @@
 .intro-news-wrap
   padding: 24px 30px
   text-decoration: none
+  &:first-child
+    padding-left: 0
+  &:last-child
+    padding-right: 0
   &:hover
     background-color: var(--color-link-hover)
   @media mq-normal
@@ -105,7 +109,7 @@
   text-align: center
   @media mq-normal
     text-align: left
-    padding-left: 70px
+    padding-left: 48px
 
 .intro-feature-icon
   color: var(--color-link)
@@ -116,7 +120,7 @@
     margin-bottom: 26px
     position: absolute
     top: 0
-    left: 20px
+    left: 0
     font-size: 24px
     width: @font-size
 
@@ -177,9 +181,11 @@
   border-bottom: 1px solid #161d24
   margin: -1px 0
   .inner
-    margin: 48px 16px
+    margin-top: 48px
+    margin-bottom: 48px
     @media mq-tablet
-      margin: 64px 32px
+      margin-top: 64px
+      margin-bottom: 64px
     h3
       color: #fff
       font-size: 32px
@@ -192,20 +198,7 @@
       text-decoration: none
 
 #contributors-wrap
-  .description a
-    color: #fff
-    &:hover
-      background: #fff
-      color: var(--color-navy-lighter)
-
-#sponsors-wrap
-  border: none
-  text-align: right
   background: var(--color-content-bg)
-  overflow: hidden;
-  .contributors
-    display: flex;
-    justify-content: right;
   .inner
     h3
       color: var(--color-default)
@@ -227,10 +220,20 @@
           background: #fff
           color: var(--color-navy-lighter)
 
+#sponsors-wrap
+  border: none
+  overflow: hidden;
+  .description a
+    color: #fff
+    &:hover
+      background: #fff
+      color: var(--color-navy-lighter)
+
 .contributors
   tr
     display: flex
     flex-wrap: wrap
+    justify-content: center;
   td
     margin: 10px 2px 0
     a img
@@ -240,3 +243,4 @@
       background: var(--color-gray)
       border-radius: 50%
       margin-bottom: 10px
+      object-fit: contain

package.json

@@ -1,6 +1,6 @@
 {
   "name": "liquidjs",
-  "version": "10.20.2",
+  "version": "10.23.0",
   "sideEffects": false,
   "description": "A simple, expressive and safe Shopify / Github Pages compatible template engine in pure JavaScript.",
   "main": "dist/liquid.node.js",
@@ -12,7 +12,7 @@
   },
   "types": "dist/index.d.ts",
   "engines": {
-    "node": ">=14"
+    "node": ">=16"
   },
   "scripts": {
     "lint": "eslint \"**/*.mjs\" \"**/*.ts\" .",

src/context/context.ts

@@ -86,7 +86,7 @@ export class Context {
   public * _getFromScope (scope: unknown, paths: (PropertyKey | Drop)[] | string, strictVariables = this.strictVariables): IterableIterator<unknown> {
     if (isString(paths)) paths = paths.split('.')
     for (let i = 0; i < paths.length; i++) {
-      scope = yield readProperty(scope as object, paths[i], this.ownPropertyOnly)
+      scope = yield this.readProperty(scope as object, paths[i])
       if (strictVariables && isUndefined(scope)) {
         throw new InternalUndefinedVariableError((paths as string[]).slice(0, i + 1).join!('.'))
       }
@@ -120,21 +120,21 @@ export class Context {
     if (key in this.environments) return this.environments
     return this.globals
   }
+  readProperty (obj: Scope, key: (PropertyKey | Drop)) {
+    obj = toLiquid(obj)
+    key = toValue(key) as PropertyKey
+    if (isNil(obj)) return obj
+    if (isArray(obj) && (key as number) < 0) return obj[obj.length + +key]
+    const value = readJSProperty(obj, key, this.ownPropertyOnly)
+    if (value === undefined && obj instanceof Drop) return obj.liquidMethodMissing(key, this)
+    if (isFunction(value)) return value.call(obj)
+    if (key === 'size') return readSize(obj)
+    else if (key === 'first') return readFirst(obj)
+    else if (key === 'last') return readLast(obj)
+    return value
+  }
 }
 
-export function readProperty (obj: Scope, key: (PropertyKey | Drop), ownPropertyOnly: boolean) {
-  obj = toLiquid(obj)
-  key = toValue(key) as PropertyKey
-  if (isNil(obj)) return obj
-  if (isArray(obj) && (key as number) < 0) return obj[obj.length + +key]
-  const value = readJSProperty(obj, key, ownPropertyOnly)
-  if (value === undefined && obj instanceof Drop) return obj.liquidMethodMissing(key)
-  if (isFunction(value)) return value.call(obj)
-  if (key === 'size') return readSize(obj)
-  else if (key === 'first') return readFirst(obj)
-  else if (key === 'last') return readLast(obj)
-  return value
-}
 export function readJSProperty (obj: Scope, key: PropertyKey, ownPropertyOnly: boolean) {
   if (ownPropertyOnly && !hasOwnProperty.call(obj, key) && !(obj instanceof Drop)) return undefined
   return obj[key]

src/drop/block-drop.ts

@@ -1,9 +1,10 @@
+import { Emitter, SimpleEmitter } from '../emitters'
 import { Drop } from './drop'
 
 export class BlockDrop extends Drop {
   constructor (
     // the block render from layout template
-    private superBlockRender: () => Iterable<any> = () => ''
+    private superBlockRender: (emitter: Emitter) => IterableIterator<unknown> | string = () => ''
   ) {
     super()
   }
@@ -11,7 +12,9 @@ export class BlockDrop extends Drop {
    * Provide parent access in child block by
    * {{ block.super }}
    */
-  public super () {
-    return this.superBlockRender()
+  public * super (): IterableIterator<unknown> {
+    const emitter = new SimpleEmitter()
+    yield this.superBlockRender(emitter)
+    return emitter.buffer
   }
 }

src/drop/drop.ts

@@ -1,5 +1,7 @@
+import { Context } from '../context'
+
 export abstract class Drop {
-  public liquidMethodMissing (key: string | number): Promise<any> | any {
+  public liquidMethodMissing (key: string | number, context: Context): Promise<any> | any {
     return undefined
   }
 }

src/filters/array.ts

@@ -117,7 +117,17 @@ export function slice<T> (this: FilterImpl, v: T[] | string, begin: number, leng
   return v.slice(begin, begin + length)
 }
 
-export function * where<T extends object> (this: FilterImpl, arr: T[], property: string, expected?: any): IterableIterator<unknown> {
+function expectedMatcher (this: FilterImpl, expected: any): (v: any) => boolean {
+  if (this.context.opts.jekyllWhere) {
+    return (v: any) => EmptyDrop.is(expected) ? equals(v, expected) : (isArray(v) ? arrayIncludes(v, expected) : equals(v, expected))
+  } else if (expected === undefined) {
+    return (v: any) => isTruthy(v, this.context)
+  } else {
+    return (v: any) => equals(v, expected)
+  }
+}
+
+function * filter<T extends object> (this: FilterImpl, include: boolean, arr: T[], property: string, expected: any): IterableIterator<unknown> {
   const values: unknown[] = []
   arr = toArray(arr)
   this.context.memoryLimit.use(arr.length)
@@ -125,16 +135,11 @@ export function * where<T extends object> (this: FilterImpl, arr: T[], property:
   for (const item of arr) {
     values.push(yield evalToken(token, this.context.spawn(item)))
   }
-  const matcher = this.context.opts.jekyllWhere
-    ? (v: any) => EmptyDrop.is(expected) ? equals(v, expected) : (isArray(v) ? arrayIncludes(v, expected) : equals(v, expected))
-    : (v: any) => equals(v, expected)
-  return arr.filter((_, i) => {
-    if (expected === undefined) return isTruthy(values[i], this.context)
-    return matcher(values[i])
-  })
+  const matcher = expectedMatcher.call(this, expected)
+  return arr.filter((_, i) => matcher(values[i]) === include)
 }
 
-export function * where_exp<T extends object> (this: FilterImpl, arr: T[], itemName: string, exp: string): IterableIterator<unknown> {
+function * filter_exp<T extends object> (this: FilterImpl, include: boolean, arr: T[], itemName: string, exp: string): IterableIterator<unknown> {
   const filtered: unknown[] = []
   const keyTemplate = new Value(stringify(exp), this.liquid)
   const array = toArray(arr)
@@ -143,11 +148,27 @@ export function * where_exp<T extends object> (this: FilterImpl, arr: T[], itemN
     this.context.push({ [itemName]: item })
     const value = yield keyTemplate.value(this.context)
     this.context.pop()
-    if (value) filtered.push(item)
+    if (value === include) filtered.push(item)
   }
   return filtered
 }
 
+export function * where<T extends object> (this: FilterImpl, arr: T[], property: string, expected?: any): IterableIterator<unknown> {
+  return yield * filter.call(this, true, arr, property, expected)
+}
+
+export function * reject<T extends object> (this: FilterImpl, arr: T[], property: string, expected?: any): IterableIterator<unknown> {
+  return yield * filter.call(this, false, arr, property, expected)
+}
+
+export function * where_exp<T extends object> (this: FilterImpl, arr: T[], itemName: string, exp: string): IterableIterator<unknown> {
+  return yield * filter_exp.call(this, true, arr, itemName, exp)
+}
+
+export function * reject_exp<T extends object> (this: FilterImpl, arr: T[], itemName: string, exp: string): IterableIterator<unknown> {
+  return yield * filter_exp.call(this, false, arr, itemName, exp)
+}
+
 export function * group_by<T extends object> (this: FilterImpl, arr: T[], property: string): IterableIterator<unknown> {
   const map = new Map()
   arr = toEnumerable(arr)
@@ -176,26 +197,57 @@ export function * group_by_exp<T extends object> (this: FilterImpl, arr: T[], it
   return [...map.entries()].map(([name, items]) => ({ name, items }))
 }
 
-export function * find<T extends object> (this: FilterImpl, arr: T[], property: string, expected: string): IterableIterator<unknown> {
+function * search<T extends object> (this: FilterImpl, arr: T[], property: string, expected: string): IterableIterator<unknown> {
   const token = new Tokenizer(stringify(property)).readScopeValue()
   const array = toArray(arr)
-  for (const item of array) {
-    const value = yield evalToken(token, this.context.spawn(item))
-    if (equals(value, expected)) return item
+  const matcher = expectedMatcher.call(this, expected)
+  for (let index = 0; index < array.length; index++) {
+    const value = yield evalToken(token, this.context.spawn(array[index]))
+    if (matcher(value)) return [index, array[index]]
   }
 }
 
-export function * find_exp<T extends object> (this: FilterImpl, arr: T[], itemName: string, exp: string): IterableIterator<unknown> {
+function * search_exp<T extends object> (this: FilterImpl, arr: T[], itemName: string, exp: string): IterableIterator<unknown> {
   const predicate = new Value(stringify(exp), this.liquid)
   const array = toArray(arr)
-  for (const item of array) {
-    this.context.push({ [itemName]: item })
+  for (let index = 0; index < array.length; index++) {
+    this.context.push({ [itemName]: array[index] })
     const value = yield predicate.value(this.context)
     this.context.pop()
-    if (value) return item
+    if (value) return [index, array[index]]
   }
 }
 
+export function * has<T extends object> (this: FilterImpl, arr: T[], property: string, expected?: any): IterableIterator<unknown> {
+  const result = yield * search.call(this, arr, property, expected)
+  return !!result
+}
+
+export function * has_exp<T extends object> (this: FilterImpl, arr: T[], itemName: string, exp: string): IterableIterator<unknown> {
+  const result = yield * search_exp.call(this, arr, itemName, exp)
+  return !!result
+}
+
+export function * find_index<T extends object> (this: FilterImpl, arr: T[], property: string, expected?: any): IterableIterator<unknown> {
+  const result = yield * search.call(this, arr, property, expected)
+  return result ? result[0] : undefined
+}
+
+export function * find_index_exp<T extends object> (this: FilterImpl, arr: T[], itemName: string, exp: string): IterableIterator<unknown> {
+  const result = yield * search_exp.call(this, arr, itemName, exp)
+  return result ? result[0] : undefined
+}
+
+export function * find<T extends object> (this: FilterImpl, arr: T[], property: string, expected?: any): IterableIterator<unknown> {
+  const result = yield * search.call(this, arr, property, expected)
+  return result ? result[1] : undefined
+}
+
+export function * find_exp<T extends object> (this: FilterImpl, arr: T[], itemName: string, exp: string): IterableIterator<unknown> {
+  const result = yield * search_exp.call(this, arr, itemName, exp)
+  return result ? result[1] : undefined
+}
+
 export function uniq<T> (this: FilterImpl, arr: T[]): T[] {
   arr = toArray(arr)
   this.context.memoryLimit.use(arr.length)

src/filters/math.ts

@@ -1,24 +1,19 @@
-import { toValue, argumentsToValue } from '../util/underscore'
+import { toNumber, argumentsToNumber } from '../util/underscore'
 
-export const abs = argumentsToValue(Math.abs)
-export const at_least = argumentsToValue(Math.max)
-export const at_most = argumentsToValue(Math.min)
-export const ceil = argumentsToValue(Math.ceil)
-export const divided_by = argumentsToValue((dividend: number, divisor: number, integerArithmetic = false) => integerArithmetic ? Math.floor(dividend / divisor) : dividend / divisor)
-export const floor = argumentsToValue(Math.floor)
-export const minus = argumentsToValue((v: number, arg: number) => v - arg)
-export const modulo = argumentsToValue((v: number, arg: number) => v % arg)
-export const times = argumentsToValue((v: number, arg: number) => v * arg)
+export const abs = argumentsToNumber(Math.abs)
+export const at_least = argumentsToNumber(Math.max)
+export const at_most = argumentsToNumber(Math.min)
+export const ceil = argumentsToNumber(Math.ceil)
+export const divided_by = argumentsToNumber((dividend: number, divisor: number, integerArithmetic = false) => integerArithmetic ? Math.floor(dividend / divisor) : dividend / divisor)
+export const floor = argumentsToNumber(Math.floor)
+export const minus = argumentsToNumber((v: number, arg: number) => v - arg)
+export const plus = argumentsToNumber((lhs: number, rhs: number) => lhs + rhs)
+export const modulo = argumentsToNumber((v: number, arg: number) => v % arg)
+export const times = argumentsToNumber((v: number, arg: number) => v * arg)
 
 export function round (v: number, arg = 0) {
-  v = toValue(v)
-  arg = toValue(arg)
+  v = toNumber(v)
+  arg = toNumber(arg)
   const amp = Math.pow(10, arg)
   return Math.round(v * amp) / amp
 }
-
-export function plus (v: number, arg: number) {
-  v = toValue(v)
-  arg = toValue(arg)
-  return Number(v) + Number(arg)
-}

src/index.ts

@@ -8,6 +8,7 @@ export { defaultOperators, Operators, evalToken, evalQuotedToken, Expression, is
 export { Context, Scope } from './context'
 export { Value, Hash, Template, FilterImplOptions, Tag, Filter, Output, Variable, VariableLocation, VariableSegments, Variables, StaticAnalysis, StaticAnalysisOptions, analyze, analyzeSync, Arguments, PartialScope } from './template'
 export { Token, TopLevelToken, TagToken, ValueToken } from './tokens'
+export type { RangeToken, LiteralToken, QuotedToken, PropertyAccessToken, NumberToken } from './tokens'
 export { TokenKind, Tokenizer, ParseStream, Parser } from './parser'
 export { filters } from './filters'
 export * from './tags'

src/tags/block.ts

@@ -39,7 +39,11 @@ export default class extends Tag {
       ctx.pop()
     }
     return renderChild
-      ? (superBlock: BlockDrop, emitter: Emitter) => renderChild(new BlockDrop(() => renderCurrent(superBlock, emitter)), emitter)
+      ? (superBlock: BlockDrop, emitter: Emitter) => renderChild(
+        new BlockDrop(
+          (emitter: Emitter) => renderCurrent(superBlock, emitter)
+        ),
+        emitter)
       : renderCurrent
   }
 

src/tokens/tag-token.ts

@@ -5,6 +5,7 @@ import type { NormalizedFullOptions } from '../liquid-options'
 export class TagToken extends DelimitedToken {
   public name: string
   public tokenizer: Tokenizer
+  public readonly args: string;
   public constructor (
     input: string,
     begin: number,
@@ -20,9 +21,6 @@ export class TagToken extends DelimitedToken {
     this.name = this.tokenizer.readTagName()
     this.tokenizer.assert(this.name, `illegal tag syntax, tag name expected`)
     this.tokenizer.skipBlank()
-  }
-
-  get args (): string {
-    return this.tokenizer.input.slice(this.tokenizer.p, this.contentRange[1])
+    this.args = this.tokenizer.input.slice(this.tokenizer.p, this.contentRange[1])
   }
 }

src/util/limiter.ts

@@ -1,5 +1,4 @@
 import { assert } from './assert'
-import { toNumber } from './underscore'
 
 export class Limiter {
   private message: string
@@ -10,12 +9,12 @@ export class Limiter {
     this.limit = limit
   }
   use (count: number) {
-    count = toNumber(count)
+    count = +count || 0
     assert(this.base + count <= this.limit, this.message)
     this.base += count
   }
   check (count: number) {
-    count = toNumber(count)
+    count = +count || 0
     assert(count <= this.limit, this.message)
   }
 }

src/util/underscore.ts

@@ -67,8 +67,7 @@ export function toValue (value: any): any {
 }
 
 export function toNumber (value: any): number {
-  value = Number(value)
-  return isNaN(value) ? 0 : value
+  return +toValue(value) || 0
 }
 
 export function isNumber (value: any): value is number {
@@ -191,6 +190,10 @@ export function argumentsToValue<F extends (...args: any) => any, T> (fn: F) {
   return function (this: T, ...args: Parameters<F>) { return fn.call(this, ...args.map(toValue)) }
 }
 
+export function argumentsToNumber<F extends (...args: any) => any, T> (fn: F) {
+  return function (this: T, ...args: Parameters<F>) { return fn.call(this, ...args.map(toNumber)) }
+}
+
 export function escapeRegExp (text: string) {
   return text.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&')
 }

test/e2e/drop.spec.ts

@@ -1,25 +1,37 @@
-import { Drop, Liquid } from '../..'
-
-class SettingsDrop extends Drop {
-  public foo = 'FOO'
-  public bar () {
-    return 'BAR'
-  }
-  public liquidMethodMissing (key: string) {
-    return key.toUpperCase()
-  }
-}
+import { Context, Drop, Liquid } from '../..'
 
 describe('drop', function () {
-  const settings = new SettingsDrop()
   let engine: Liquid
   beforeEach(function () {
     engine = new Liquid()
   })
-  it('should support liquidMethodMissing', async function () {
-    const src = `{{settings.foo}},{{settings.bar}},{{settings.coo}}`
-    const html = await engine.parseAndRender(src, { settings })
-    return expect(html).toBe('FOO,BAR,COO')
+
+  describe('liquidMethodMissing', () => {
+    it('should support liquidMethodMissing', async function () {
+      class SettingsDrop extends Drop {
+        public foo = 'FOO'
+        public bar () {
+          return 'BAR'
+        }
+        public liquidMethodMissing (key: string) {
+          return key.toUpperCase()
+        }
+      }
+      const src = `{{settings.foo}},{{settings.bar}},{{settings.coo}}`
+      const html = await engine.parseAndRender(src, { settings: new SettingsDrop() })
+      return expect(html).toBe('FOO,BAR,COO')
+    })
+
+    it('should expose context', async function () {
+      class SettingsDrop extends Drop {
+        public liquidMethodMissing (key: string, context: Context) {
+          return key + ':' + context.getSync([key])
+        }
+      }
+      const src = `{{settings.foo}}`
+      const html = await engine.parseAndRender(src, { settings: new SettingsDrop(), foo: 'FOO' })
+      return expect(html).toBe('foo:FOO')
+    })
   })
 
   describe('BlandDrop', function () {

test/e2e/issues.spec.ts

@@ -1,4 +1,4 @@
-import { TopLevelToken, TagToken, Tokenizer, Context, Liquid, Drop, toValueSync, LiquidError } from '../..'
+import { TopLevelToken, TagToken, Tokenizer, Context, Liquid, Drop, toValueSync, LiquidError, IfTag } from '../..'
 const LiquidUMD = require('../../dist/liquid.browser.umd.js').Liquid
 
 describe('Issues', function () {
@@ -558,4 +558,11 @@ describe('Issues', function () {
           CSharp <sup>2</sup> Posts:page2,page4,
           CPP <sup>1</sup> Posts:page0,`)
   })
+  it('if tag condition, the token args is empty #796', () => {
+    const tpl = 'Hello, {% if name  %} {{ name }} {% else %} user {% endif %}'
+    const engine = new Liquid()
+    const parsed = engine.parse(tpl)
+    const ifToken = parsed[1]
+    expect((ifToken as IfTag).token.args).toEqual('name')
+  })
 })

test/integration/filters/array.spec.ts

@@ -417,6 +417,32 @@ describe('filters/array', function () {
         - Boring sneakers
         `)
     })
+    it('should support filter with undefined target', function () {
+      return test(`{% assign typed_products = products | where: "type", notdefined %}
+        Typed products:
+        {% for product in typed_products -%}
+        - {{ product.title }}
+        {% endfor %}`, { products }, `
+        Typed products:
+        - Vacuum
+        - Spatula
+        - Television
+        - Garlic press
+        `)
+    })
+    it('should support no target', function () {
+      return test(`{% assign typed_products = products | where: "type" %}
+        Typed products:
+        {% for product in typed_products -%}
+        - {{ product.title }}
+        {% endfor %}`, { products }, `
+        Typed products:
+        - Vacuum
+        - Spatula
+        - Television
+        - Garlic press
+        `)
+    })
     it('should support nested property', async function () {
       const authors = [
         { name: 'Alice', books: { year: 2019 } },
@@ -491,7 +517,7 @@ describe('filters/array', function () {
       await test('{{objs | where: "foo", "FOO" | json}}', scope, '[]')
     })
     describe('jekyll style', () => {
-      it('should not match string with array', async () => {
+      it('should filter arrays by inclusion', async () => {
         const scope = { objs: [{ foo: ['FOO', 'bar'] }] }
         await test('{{objs | where: "foo", "FOO" | json}}', scope, '[{"foo":["FOO","bar"]}]', { jekyllWhere: true })
       })
@@ -499,6 +525,14 @@ describe('filters/array', function () {
         const scope = { pages: [{ tags: ['FOO'] }, { tags: [] }, { title: 'foo' }] }
         await test('{{pages | where: "tags", empty | json}}', scope, '[{"tags":[]}]', { jekyllWhere: true })
       })
+      it('should filter by undefined when target is omitted', async () => {
+        await test('{{products | where: "type" | map: "title" | join: ","}}', { products },
+          'Coffee mug,Limited edition sneakers,Boring sneakers', { jekyllWhere: true })
+      })
+      it('should filter plainly when target is undefined', async () => {
+        await test('{{products | where: "type", notdefined | map: "title" | join: ","}}', { products },
+          'Coffee mug,Limited edition sneakers,Boring sneakers', { jekyllWhere: true })
+      })
     })
   })
   describe('where_exp', function () {
@@ -537,6 +571,89 @@ describe('filters/array', function () {
       return test(tpl, scope, html)
     })
   })
+  describe('reject', function () {
+    const products = [
+      { title: 'Vacuum', type: 'living room' },
+      { title: 'Spatula', type: 'kitchen' },
+      { title: 'Television', type: 'living room' },
+      { title: 'Garlic press', type: 'kitchen' },
+      { title: 'Coffee mug', available: true },
+      { title: 'Limited edition sneakers', available: false },
+      { title: 'Boring sneakers', available: true }
+    ]
+    it('should support reject by property value', function () {
+      return test(`{% assign kitchen_products = products | reject: "type", "kitchen" %}
+        Kitchen products:
+        {% for product in kitchen_products -%}
+        - {{ product.title }}
+        {% endfor %}`, { products }, `
+        Kitchen products:
+        - Vacuum
+        - Television
+        - Coffee mug
+        - Limited edition sneakers
+        - Boring sneakers
+        `)
+    })
+    it('should support reject truthy property', function () {
+      return test(`{% assign unavailable_products = products | reject: "available" %}
+        Unavailable products:
+        {% for product in unavailable_products -%}
+        - {{ product.title }}
+        {% endfor %}`, { products }, `
+        Unavailable products:
+        - Vacuum
+        - Spatula
+        - Television
+        - Garlic press
+        - Limited edition sneakers
+        `)
+    })
+    it('should support reject by string property', function () {
+      return test(`{% assign untyped_products = products | reject: "type" %}
+        Untyped products:
+        {% for product in untyped_products -%}
+        - {{ product.title }}
+        {% endfor %}`, { products }, `
+        Untyped products:
+        - Coffee mug
+        - Limited edition sneakers
+        - Boring sneakers
+        `)
+    })
+    describe('jekyll style', () => {
+      it('should filter arrays by exclusion', async () => {
+        const scope = { objs: [{ foo: ['FOO', 'bar'] }, { foo: ['bar', 'baz'] }, { foo: ['FOO'] }] }
+        await test('{{objs | reject: "foo", "FOO" | json}}', scope, '[{"foo":["bar","baz"]}]', { jekyllWhere: true })
+      })
+      it('should filter by undefined when target is omitted', async () => {
+        await test('{{products | reject: "type" | map: "title" | join: ","}}', { products },
+          'Vacuum,Spatula,Television,Garlic press', { jekyllWhere: true })
+      })
+    })
+  })
+  describe('reject_exp', function () {
+    const products = [
+      { title: 'Vacuum', type: 'living room' },
+      { title: 'Spatula', type: 'kitchen' },
+      { title: 'Television', type: 'living room' },
+      { title: 'Garlic press', type: 'kitchen' },
+      { title: 'Coffee mug', available: true },
+      { title: 'Limited edition sneakers', available: false },
+      { title: 'Boring sneakers', available: true }
+    ]
+    it('should support reject by exp', function () {
+      return test(`{% assign kitchen_products = products | reject_exp: "item", "item.type != 'kitchen'" %}
+        Kitchen products:
+        {% for product in kitchen_products -%}
+        - {{ product.title }}
+        {% endfor %}`, { products }, `
+        Kitchen products:
+        - Spatula
+        - Garlic press
+        `)
+    })
+  })
   describe('group_by', function () {
     const members = [
       { graduation_year: 2003, name: 'Jay' },
@@ -616,12 +733,76 @@ describe('filters/array', function () {
         JSON.stringify(expected))
     })
   })
-  describe('find', function () {
+  describe('has', function () {
+    const members = [
+      { graduation_year: 2013, name: 'Jay' },
+      { graduation_year: 2014, name: 'John' },
+      { graduation_year: 2014, name: 'Jack', age: 13 }
+    ]
+    it('should support has with no value', function () {
+      return test(
+        `{{ members | has: "age" | json }}, {{ members | has: "height" | json }}`,
+        { members },
+        `true, false`)
+    })
+    it('should support has by property', function () {
+      return test(
+        `{{ members | has: "graduation_year", 2014 | json }}`,
+        { members },
+        `true`)
+    })
+    it('should return false if not found', function () {
+      return test(
+        `{{ members | has: "graduation_year", 2018 | json }}`,
+        { members },
+        `false`)
+    })
+    describe('jekyll style', () => {
+      it('should select array by inclusion', async () => {
+        const scope = { objs: [{ foo: ['FOO', 'bar'] }] }
+        await test('{{objs | has: "foo", "FOO" | json}}', scope, 'true', { jekyllWhere: true })
+      })
+      it('should support empty as target', async () => {
+        const scope = { pages: [{ tags: ['FOO'] }, { tags: [] }, { title: 'foo' }] }
+        await test('{{pages | has: "tags", empty | json}}', scope, 'true', { jekyllWhere: true })
+      })
+      it('should search plainly when target is undefined', async () => {
+        await test('{{members | has: "age", notdefined}}', { members }, 'true', { jekyllWhere: true })
+        await test('{{members | has: "name", notdefined}}', { members }, 'false', { jekyllWhere: true })
+      })
+    })
+  })
+  describe('has_exp', function () {
     const members = [
       { graduation_year: 2013, name: 'Jay' },
       { graduation_year: 2014, name: 'John' },
       { graduation_year: 2014, name: 'Jack' }
     ]
+    it('should support has by expression', function () {
+      return test(
+        `{{ members | has_exp: "item", "item.graduation_year == 2014" | json }}`,
+        { members },
+        `true`)
+    })
+    it('should return false if not found', function () {
+      return test(
+        `{{ members | has_exp: "item", "item.graduation_year == 2018" | json }}`,
+        { members },
+        `false`)
+    })
+  })
+  describe('find', function () {
+    const members = [
+      { graduation_year: 2013, name: 'Jay' },
+      { graduation_year: 2014, name: 'John' },
+      { graduation_year: 2014, name: 'Jack', age: 13 }
+    ]
+    it('should support find with no value', function () {
+      return test(
+        `{{ members | find: "age" | json }}`,
+        { members },
+        `{"graduation_year":2014,"name":"Jack","age":13}`)
+    })
     it('should support find by property', function () {
       return test(
         `{{ members | find: "graduation_year", 2014 | json }}`,
@@ -634,6 +815,24 @@ describe('filters/array', function () {
         { members },
         ``)
     })
+    describe('jekyll style', () => {
+      it('should select array by inclusion', async () => {
+        const scope = { objs: [{ foo: ['FOO', 'bar'] }] }
+        await test('{{objs | find: "foo", "FOO" | json}}', scope, '{"foo":["FOO","bar"]}', { jekyllWhere: true })
+      })
+      it('should support empty as target', async () => {
+        const scope = { pages: [{ tags: ['FOO'] }, { tags: [] }, { title: 'foo' }] }
+        await test('{{pages | find: "tags", empty | json}}', scope, '{"tags":[]}', { jekyllWhere: true })
+      })
+      it('should search plainly when target is undefined', async () => {
+        await test(
+          '{{members | find: "age", notdefined | json}}',
+          { members },
+          '{"graduation_year":2013,"name":"Jay"}',
+          { jekyllWhere: true })
+        await test('{{members | find: "name", notdefined | json}}', { members }, '', { jekyllWhere: true })
+      })
+    })
   })
   describe('find_exp', function () {
     const members = [
@@ -654,4 +853,62 @@ describe('filters/array', function () {
         ``)
     })
   })
+  describe('find_index', function () {
+    const members = [
+      { graduation_year: 2013, name: 'Jay' },
+      { graduation_year: 2014, name: 'John' },
+      { graduation_year: 2014, name: 'Jack', age: 13 }
+    ]
+    it('should support find_index with no value', function () {
+      return test(
+        `{{ members | find_index: "age" | json }}`,
+        { members },
+        `2`)
+    })
+    it('should support find_index by property', function () {
+      return test(
+        `{{ members | find_index: "graduation_year", 2014 | json }}`,
+        { members },
+        `1`)
+    })
+    it('should render none if not found', function () {
+      return test(
+        `{{ members | find_index: "graduation_year", 2018 | json }}`,
+        { members },
+        ``)
+    })
+    describe('jekyll style', () => {
+      it('should select array by inclusion', async () => {
+        const scope = { objs: [{ foo: ['FOO', 'bar'] }] }
+        await test('{{objs | find_index: "foo", "FOO" | json}}', scope, '0', { jekyllWhere: true })
+      })
+      it('should support empty as target', async () => {
+        const scope = { pages: [{ tags: ['FOO'] }, { tags: [] }, { title: 'foo' }] }
+        await test('{{pages | find_index: "tags", empty | json}}', scope, '1', { jekyllWhere: true })
+      })
+      it('should search plainly when target is undefined', async () => {
+        await test('{{members | find_index: "age", notdefined | json}}', { members }, '0', { jekyllWhere: true })
+        await test('{{members | find_index: "name", notdefined | json}}', { members }, '', { jekyllWhere: true })
+      })
+    })
+  })
+  describe('find_index_exp', function () {
+    const members = [
+      { graduation_year: 2013, name: 'Jay' },
+      { graduation_year: 2014, name: 'John' },
+      { graduation_year: 2014, name: 'Jack' }
+    ]
+    it('should support find_index by expression', function () {
+      return test(
+        `{{ members | find_index_exp: "item", "item.graduation_year == 2014" | json }}`,
+        { members },
+        `1`)
+    })
+    it('should render none if not found', function () {
+      return test(
+        `{{ members | find_index_exp: "item", "item.graduation_year == 2018" | json }}`,
+        { members },
+        ``)
+    })
+  })
 })

test/integration/filters/math.spec.ts

@@ -56,8 +56,9 @@ describe('filters/math', function () {
     it('should return "20" for 16,4', () => test('{{ 16 | plus: 4 }}', '20'))
     it('should return "195.357" for 183.357,12',
       () => test('{{ 183.357 | plus: 12 }}', '195.357'))
-    it('should convert first arg as number', () => test('{{ "4" | plus: 2 }}', '6'))
-    it('should convert both args as number', () => test('{{ "4" | plus: "2" }}', '6'))
+    it('should convert first arg to number', () => test('{{ "4" | plus: 2 }}', '6'))
+    it('should convert both args to numbers', () => test('{{ "4" | plus: "2" }}', '6'))
+    it('should convert invalid string to 0', () => test('{{ "abc" | plus: "2" }}', '2'))
     it('should support variable', () => test('{{ 4 | plus: b }}', { b: 2 }, '6'))
   })
 

test/integration/tags/layout.spec.ts

@@ -101,6 +101,26 @@ describe('tags/layout', function () {
     const output = '<link href="base.css" rel="stylesheet"><link href="extra.css" rel="stylesheet">'
     return expect(html).toBe(output)
   })
+  it('should pass block.super as a string', async function () {
+    mock({
+      '/parent.html': '{% block css %}<link href="base.css" rel="stylesheet">{% endblock %}'
+    })
+    const src = '{% layout "parent.html" %}' +
+      '{%block css%}{{block.super}}<meta basesize={{block.super | size}}>{%endblock%}'
+    const html = await liquid.parseAndRender(src)
+    const output = '<link href="base.css" rel="stylesheet"><meta basesize=39>'
+    return expect(html).toBe(output)
+  })
+  it('should support block.super while strictVariables', async function () {
+    mock({
+      '/parent.html': '{% block css %}<link href="base.css" rel="stylesheet">{% endblock %}'
+    })
+    const src = '{% layout "parent.html" %}' +
+      '{%block css%}{{block.super}}<link href="extra.css" rel="stylesheet">{%endblock%}'
+    const html = await liquid.parseAndRender(src, undefined, { strictVariables: true })
+    const output = '<link href="base.css" rel="stylesheet"><link href="extra.css" rel="stylesheet">'
+    return expect(html).toBe(output)
+  })
   it('should render block.super to empty if no parent exists', async function () {
     mock({
       '/parent.html': '{% block css %}{{block.super}}<link href="base.css" rel="stylesheet">{% endblock %}'