1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27(function (module) { var Keyword = function (value) { this.value = value }; Keyword.prototype = { type: "Keyword", eval: function () { return this; }, toCSS: function () { return this.value; }, compare: function (other) { if (other instanceof Keyword) { return other.value === this.value ? 0 : 1; } else { return -1; } } }; module.exports = Keyword; })(module);