Function keys

_benchmarks/sample_echarts.js:435–449

(obj)

        }
    }
    function keys(obj) {
        if (!obj) {
            return [];
        }
        if (Object.keys) {
            return Object.keys(obj);
        }
        var keyList = [];
        for (var key in obj) {
            if (obj.hasOwnProperty(key)) {
                keyList.push(key);
            }
        }
        return keyList;
    }
    function bindPolyfill(func, context) {
        var args = [];
        for (var _i = 2; _i < arguments.length; _i++) {