Edit File: Attribute.js
// Can unquote attribute detection // Adopted implementation of Mathias Bynens // https://github.com/mathiasbynens/mothereff.in/blob/master/unquoted-attributes/eff.js var escapesRx = /\\([0-9A-Fa-f]{1,6})[ \t\n\f\r]?|\\./g; var blockUnquoteRx = /^(-?\d|--)|[\u0000-\u002c\u002e\u002f\u003A-\u0040\u005B-\u005E\u0060\u007B-\u009f]/; function canUnquote(value) { if (value === '' || value === '-') { return; } // Escapes are valid, so replace them with a valid non-empty string value = value.replace(escapesRx, 'a'); return !blockUnquoteRx.test(value); } module.exports = function(node) { var attrValue = node.value; if (!attrValue || attrValue.type !== 'String') { return; } var unquotedValue = attrValue.value.replace(/^(.)(.*)\1$/, '$2'); if (canUnquote(unquotedValue)) { node.value = { type: 'Identifier', info: attrValue.info, name: unquotedValue }; } };
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