Function advance

docs/assets/getting-started-assets/javascripts/JSXTransformer.js:4387–4452

()

                        }

                        function advance() {
                            var ch

                            if (!state.inJSXChild) {
                                skipComment()
                            }

                            if (index >= length) {
                                return {
                                    type: Token.EOF,
                                    lineNumber: lineNumber,
                                    lineStart: lineStart,
                                    range: [index, index]
                                }
                            }

                            if (state.inJSXChild) {
                                return advanceJSXChild()
                            }

                            ch = source.charCodeAt(index)

                            // Very common: ( and ) and ;
                            if (ch === 40 || ch === 41 || ch === 58) {
                                return scanPunctuator()
                            }

                            // String literal starts with single quote (#39) or double quote (#34).
                            if (ch === 39 || ch === 34) {
                                if (state.inJSXTag) {
                                    return scanJSXStringLiteral()
                                }
                                return scanStringLiteral()
                            }

                            if (state.inJSXTag && isJSXIdentifierStart(ch)) {
                                return scanJSXIdentifier()
                            }

                            if (ch === 96) {
                                return scanTemplate()
                            }
                            if (isIdentifierStart(ch)) {
                                return scanIdentifier()
                            }

                            // Dot (.) char #46 can also start a floating-point number, hence the need
                            // to check the next character.
                            if (ch === 46) {
                                if (isDecimalDigit(source.charCodeAt(index + 1))) {
                                    return scanNumericLiteral()
                                }
                                return scanPunctuator()
                            }

                            if (isDecimalDigit(ch)) {
                                return scanNumericLiteral()
                            }