Normative: disallows UnicodeEscapeSequence #139
+470
−115
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For the following code:
TypeScript: accept this syntax
TypeScript: reject this syntax after microsoft/TypeScript#48609
Babel: syntax error
swc: syntax error
esbuild:
npx esbuild --loader=jsx <<< 'const x = <video></\u0076ideo>'
Suggested change
Disallows UnicodeEscapeSequence in the JSXIdentifier
Another path
Allow UnicodeEscapeSequence but require them to match in the opening and the closing tag, which means
<video></\u0076ideo>
is a syntax error (tag mismatch) but<\u0076ideo />
is OK.