feat: automatic output escaping, closes #500

src/template/output.ts

@@ -5,12 +5,20 @@ import { Context } from '../context/context'
 import { Emitter } from '../emitters/emitter'
 import { OutputToken } from '../tokens/output-token'
 import { Liquid } from '../liquid'
+import { Filter } from './filter/filter'
 
 export class Output extends TemplateImpl<OutputToken> implements Template {
   private value: Value
   public constructor (token: OutputToken, liquid: Liquid) {
     super(token)
     this.value = new Value(token.content, liquid)
+    const filters = this.value.filters
+    const outputEscape = liquid.options.outputEscape
+    if (filters.length && filters[filters.length - 1].name === 'raw') {
+      filters.pop()
+    } else if (outputEscape) {
+      filters.push(new Filter(toString.call(outputEscape), outputEscape, [], liquid))
+    }
   }
   public * render (ctx: Context, emitter: Emitter): IterableIterator<unknown> {
     const val = yield this.value.value(ctx, false)