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docs: revert unnecessary tutorial churn from memoryLimit PR

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Restore the two-example register-filters-tags structure (Value + Hash)
and undo unrelated constructor/emitter doc edits not required for DoS limits.

Co-authored-by: Cursor <[email protected]>
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Yang Jun
2026-07-14 21:41:46 +08:00
co-authored by Cursor
parent e88bf4aba3
commit d0b61fc5fe
3 changed files with 49 additions and 44 deletions
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docs/source/tutorials/sync-and-async.md
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@@ -50,8 +50,6 @@ All built-in tags are implemented this way and are safe to use in both sync and
- do not directly `return <Promise>`, and
- do not call any APIs that return a Promise.
You can write output with `emitter.write()` or `return` / `return yield` an HTML string — both are emitted to output. Returning is handy for simple tags that produce one value (for example `{% cycle %}`); use `emitter.write()` when writing output incrementally or when delegating via `yield renderTemplates()`, since nested templates write through the shared emitter.
## Call APIs that return a Promise
But LiquidJS is Promise-friendly, right? You can still call Promise-based functions and wait for that Promise within tag implementations. Just replace `await` with `yield`. e.g. we're calling `fs.readFile()` which returns a `Promise`: