update: Use TextDecoder to remove BOM from a string

index.js

@@ -3,6 +3,8 @@
 var through = require('through2');
 var isUTF8 = require('is-utf8');
 
+var removeBom = new TextDecoder('utf-8', { ignoreBOM: false });
+
 function removeBomStream() {
   var completed = false;
   var buffer = Buffer.alloc(0);
@@ -14,7 +16,10 @@ function removeBomStream() {
 
     buffer = null;
 
-    return removeBom(data);
+    if (isUTF8(data)) {
+      return removeBom.decode(data);
+    }
+    return data;
   }
 
   function onChunk(data, enc, cb) {
@@ -47,19 +52,4 @@ function removeBomStream() {
   }
 }
 
-function removeBom(buf) {
-  if (Buffer.isBuffer(buf) && matchBOM(buf) && maybeUTF8(buf)) {
-    return buf.slice(3);
-  }
-  return buf;
-}
-
-function matchBOM(buf) {
-  return buf[0] === 0xEF && buf[1] === 0xBB && buf[2] === 0xBF;
-}
-
-function maybeUTF8(buf) {
-  return isUTF8(buf.slice(3, 7));
-}
-
 module.exports = removeBomStream;