Javascript trim() 函数在 IE8 中不起作用？
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trim() function doesn't work in IE8?
提问by Mukul
Whenever I use the trim()function on a string, it works fine with Chrome and Firefox but I get an error in IE8 saying :
每当我trim()在字符串上使用该函数时，它在 Chrome 和 Firefox 上都可以正常工作，但在 IE8 中出现错误，提示：
Object doesn't support this property or method
对象不支持此属性或方法
Can anyone tell me why this happens and if there is a work around?
谁能告诉我为什么会发生这种情况以及是否有解决方法？
回答by nemo
IE8 doesn't support the trim function. Here's a polyfill:
IE8 不支持修剪功能。这是一个polyfill：
if(typeof String.prototype.trim !== 'function') {
String.prototype.trim = function() {
return this.replace(/^\s+|\s+$/g, '');
};
}
回答by Karesh A
if you want you can add jquery and use $.trim(....) this will work..
如果你愿意，你可以添加 jquery 并使用 $.trim(....) 这将工作..
$.trim(" hello ");
give you
给你
"hello"
回答by dav_i
Internet Explorer only started support for trim()from version 9.
Internet Explorer 仅从trim()版本 9开始支持。
For reference, the MDN Polyfill for String.prototype.trim()is:
作为参考，MDN PolyfillString.prototype.trim()是：
if (!String.prototype.trim) {
(function() {
// Make sure we trim BOM and NBSP
var rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
String.prototype.trim = function() {
return this.replace(rtrim, '');
};
})();
}
and the supportfor it is:
对它的支持是：
+--------+---------+----+-------+--------+
| Chrome | Firefox | IE | Opera | Safari |
+--------+---------+----+-------+--------+
| All | 3.5 | 9 | 10.5 | 5 |
+--------+---------+----+-------+--------+
回答by Amit Bhagat
Since, I was using jQuery, with the help of @nemo and @karesh-a I came up with:
因为，我使用 jQuery，在 @nemo 和 @karesh-a 的帮助下，我想出了：
if(typeof String.prototype.trim !== 'function') {
String.prototype.trim = function(){
return jQuery.trim( this );
}
}
