JavaScript 的数组过滤方法在 IE 7 中不起作用
An Array's filter method of JavaScript is not working in IE 7
我在 Web 应用程序中使用了一个 jQuery
插件,它在 IE 10 和 11 中运行良好。但它在 IE 7 中失败了。
当我调查时,我才知道 filter
方法的值是 undefined
。
失败的代码行如下:
if (splitters.filter(Boolean).length === 0) {
我正在使用jQuery 1.8.3
是JavaScriptfilter()
method , it's only supported in IE 9+ as per the MDN documentation
Check polyfill option from MDN for older browser.
if (!Array.prototype.filter) {
Array.prototype.filter = function(fun/*, thisArg*/) {
'use strict';
if (this === void 0 || this === null) {
throw new TypeError();
}
var t = Object(this);
var len = t.length >>> 0;
if (typeof fun !== 'function') {
throw new TypeError();
}
var res = [];
var thisArg = arguments.length >= 2 ? arguments[1] : void 0;
for (var i = 0; i < len; i++) {
if (i in t) {
var val = t[i];
// NOTE: Technically this should Object.defineProperty at
// the next index, as push can be affected by
// properties on Object.prototype and Array.prototype.
// But that method's new, and collisions should be
// rare, so use the more-compatible alternative.
if (fun.call(thisArg, val, i, t)) {
res.push(val);
}
}
}
return res;
};
}
我在 Web 应用程序中使用了一个 jQuery
插件,它在 IE 10 和 11 中运行良好。但它在 IE 7 中失败了。
当我调查时,我才知道 filter
方法的值是 undefined
。
失败的代码行如下:
if (splitters.filter(Boolean).length === 0) {
我正在使用jQuery 1.8.3
是JavaScriptfilter()
method , it's only supported in IE 9+ as per the MDN documentation
Check polyfill option from MDN for older browser.
if (!Array.prototype.filter) {
Array.prototype.filter = function(fun/*, thisArg*/) {
'use strict';
if (this === void 0 || this === null) {
throw new TypeError();
}
var t = Object(this);
var len = t.length >>> 0;
if (typeof fun !== 'function') {
throw new TypeError();
}
var res = [];
var thisArg = arguments.length >= 2 ? arguments[1] : void 0;
for (var i = 0; i < len; i++) {
if (i in t) {
var val = t[i];
// NOTE: Technically this should Object.defineProperty at
// the next index, as push can be affected by
// properties on Object.prototype and Array.prototype.
// But that method's new, and collisions should be
// rare, so use the more-compatible alternative.
if (fun.call(thisArg, val, i, t)) {
res.push(val);
}
}
}
return res;
};
}