Allow HTML comments on first line (#9760)

2019-03-25 14:22:57 -07:00
parent 3aaafae053
commit aaefc83a6c
3 changed files with 107 additions and 1 deletions
--- a/packages/babel-parser/src/tokenizer/index.js
+++ b/packages/babel-parser/src/tokenizer/index.js
@@ -526,7 +526,10 @@ export default class Tokenizer extends LocationParser {
        next === charCodes.dash &&
        !this.inModule &&
        this.input.charCodeAt(this.state.pos + 2) === charCodes.greaterThan &&
-        lineBreak.test(this.input.slice(this.state.lastTokEnd, this.state.pos))
+        (this.state.lastTokEnd === 0 ||
+          lineBreak.test(
+            this.input.slice(this.state.lastTokEnd, this.state.pos),
+          ))
      ) {
        // A `-->` line comment
        this.skipLineComment(3);