fix: ignoreBOM support in TextDecoder polyfill

ChALkeR · ChALkeR · commit d9f36f8ed0f9 · 2025-12-08T00:31:45.000+04:00
diff --git a/bundler/modules/text-encoding-utf.cjs b/bundler/modules/text-encoding-utf.cjs
@@ -65,7 +65,6 @@ function TextDecoder(encoding = UTF8, options = {}) {
   assertUTF8orUTF16LE(encoding)
 
   const { fatal = false, ignoreBOM = false, stream = false } = options
-  if (ignoreBOM !== false) throw new Error('option "ignoreBOM" is not supported')
   if (stream !== false) throw new Error('option "stream" is not supported')
 
   // see: https://github.com/inexorabletash/text-encoding/blob/master/lib/encoding.js#L1049
@@ -91,7 +90,7 @@ TextDecoder.prototype.decode = function (buf) {
     }
   }
 
-  return res
+  return !this.ignoreBOM && res.codePointAt(0) === 0xfeff ? res.slice(1) : res
 }
 
 module.exports = { TextEncoder, TextDecoder }

Original file line number	Diff line number	Diff line change
`@@ -65,7 +65,6 @@ function TextDecoder(encoding = UTF8, options = {}) {`
`65`	`65`	`assertUTF8orUTF16LE(encoding)`
`66`	`66`
`67`	`67`	`const { fatal = false, ignoreBOM = false, stream = false } = options`
`68`		`- if (ignoreBOM !== false) throw new Error('option "ignoreBOM" is not supported')`
`69`	`68`	`if (stream !== false) throw new Error('option "stream" is not supported')`
`70`	`69`
`71`	`70`	`// see: https://github.com/inexorabletash/text-encoding/blob/master/lib/encoding.js#L1049`
`@@ -91,7 +90,7 @@ TextDecoder.prototype.decode = function (buf) {`
`91`	`90`	`}`
`92`	`91`	`}`
`93`	`92`
`94`		`- return res`
	`93`	`+ return !this.ignoreBOM && res.codePointAt(0) === 0xfeff ? res.slice(1) : res`
`95`	`94`	`}`
`96`	`95`
`97`	`96`	`module.exports = { TextEncoder, TextDecoder }`