Function isJSXIdentifierStart

lib/assets/javascripts/JSXTransformer.js:9077–9080

(ch)

    }

    function isJSXIdentifierStart(ch) {
        // exclude backslash (\)
        return (ch !== 92) && isIdentifierStart(ch);
    }

    function isJSXIdentifierPart(ch) {
        // exclude backslash (\) and add hyphen (-)