IE8 和 JQuery 的 trim()
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IE8 and JQuery's trim()
提问by Abs
I am making use of trim() like so:
我正在使用 trim() 像这样：
if($('#group_field').val().trim()!=''){
Where group_fieldis an input element of type text. This works in Firefox but when I try it on IE8 it gives me this error:
哪里group_field是文本类型的输入元素。这在 Firefox 中有效，但是当我在 IE8 上尝试时，它给了我这个错误：
Message: Object doesn't support this property or method
When I remove the trim(), it works fine on IE8. I thought the way I am using trim() is correct?
当我删除trim() 时，它在IE8 上运行良好。我认为我使用 trim() 的方式是正确的吗？
Thanks all for any help
感谢大家的帮助
回答by Sarfraz
Try this instead:
试试这个：
if($.trim($('#group_field').val()) != ''){
More Info:
更多信息：
回答by Alex Gyoshev
回答by Bang Dao
As far as I know, Javascript String does not have the method trim. If you want to use function trim, then use
据我所知，Javascript String 没有修剪方法。如果要使用功能修剪，则使用
<script>
$.trim(string);
</script>
回答by andreister
Another option will be to define the method directly on Stringin case it's missing:
另一种选择是直接定义方法String，以防它丢失：
if(typeof String.prototype.trim !== 'function') {
String.prototype.trim = function() {
//Your implementation here. Might be worth looking at perf comparison at
//http://blog.stevenlevithan.com/archives/faster-trim-javascript
//
//The most common one is perhaps this:
return this.replace(/^\s+|\s+$/g, '');
}
}
Then trimwill work regardless of the browser:
然后trim无论浏览器如何都可以工作：
var result = " trim me ".trim();
回答by Stone
To globally trim input with type text using jQuery:
使用 jQuery 全局修剪文本类型的输入：
/**
* Trim the site input[type=text] fields globally by removing any whitespace from the
* beginning and end of a string on input .blur()
*/
$('input[type=text]').blur(function(){
$(this).val($.trim($(this).val()));
});
