IE8補充

有一些 低階 的瀏覽器會不支援一些應該要有的功

Date.prototype.toISOString

if( !Date.prototype.toISOString ){
    (function() {
        function pad(getnumber) {
            var r = String(getnumber);
            if ( r.length === 1 ) {
                r = '0' + r;
            }
            return r;
        }
        Date.prototype.toISOString = function() {
            return this.getUTCFullYear()
                + '-' + pad( parseInt(this.getUTCMonth()) + 1 )
                + '-' + pad( parseInt(this.getUTCDate()) )
                + 'T' + pad( parseInt(this.getUTCHours()) )
                + ':' + pad( parseInt(this.getUTCMinutes()) )
                + ':' + pad( parseInt(this.getUTCSeconds()) )
                + '.' + String( (this.getUTCMilliseconds()/1000).toFixed(3) ).slice( 2, 5 )
                + 'Z';
        };       
    }());
}

Array.prototype.find

if (!Array.prototype.find) {
    Array.prototype.find = function(predicate) {
        if (this === null) {
            throw new TypeError('Array.prototype.find called on null or undefined');
        }
        if (typeof predicate !== 'function') {
            throw new TypeError('predicate must be a function');
        }
        var list = Object(this);
        var length = list.length >>> 0;
        var thisArg = arguments[1];
        var value;

        for (var i = 0; i < length; i++) {
            value = list[i];
            if (predicate.call(thisArg, value, i, list)) {
                return value;
            }
        }
        return undefined;
    };
}

Array.prototype.indexOf

if (!Array.prototype.indexOf){
    Array.prototype.indexOf = function(elt /*, from*/)
    {
        var len = this.length >>> 0;

        var from = Number(arguments[1]) || 0;
        from = (from < 0)
                 ? Math.ceil(from)
                 : Math.floor(from);
        if (from < 0)
            from += len;

        for (; from < len; from++)
        {
            if (from in this &&
                    this[from] === elt)
                return from;
        }
        return -1;
    };
}

Array.prototype.map

if (!Array.prototype.map) {
    Array.prototype.map = function(callback, thisArg) {
        var T, A, k;
        if (this == null) {
            throw new TypeError(' this is null or not defined');
        }
        var O = Object(this);
        var len = O.length >>> 0;
        if (typeof callback !== 'function') {
            throw new TypeError(callback + ' is not a function');
        }
        if (arguments.length > 1) {
            T = thisArg;
        }
        A = new Array(len);
        k = 0;
        while (k < len) {
            var kValue, mappedValue;
            if (k in O) {
                kValue = O[k];
                mappedValue = callback.call(T, kValue, k, O);
                A[k] = mappedValue;
            }
            k++;
        }
        return A;
    };
}