A jQuery extension function_PHP tutorial

When I ran the jQuery code in the book today, I don’t know if it was a mistake in the book or a problem with my jQuery version. There is a jQuery function in the example that does not exist, which is the contains function. The book introduces this function. It filters the selected element set according to the content of the element. When I run the code, I always get an error. Later I found out that this function does not exist in the function library, so I wrote this function myself.
The code is as follows:
[php]
function yhCheckIsIncludingValue(element, pattern)
{
var bool = false;
var childrenNodes = element.childNodes;
if (childrenNodes.length == 0)
{
If (element.nodeValue != null)
{
If (pattern.exec(element.nodeValue) != null)
{
Return true;
}
}
}
if (childrenNodes.length != 0)
{
for (var i = 0 ; i < childrenNodes.length ; i++)
{
If (bool = yhCheckIsIncludingValue(childrenNodes, pattern)) break;
}
}
return bool;
}

//Apply this function in the function chain
$.fn.contains = function(text)
{
var text = $.trim(text);
If (text == undefined) return this;
var pattern = new RegExp(text, i);
Return this.filter(function(){
                return yhCheckIsIncludingValue(this, pattern);
           });
}
[/php]

It runs normally on IE browser. I wonder what will happen with other browsers?

http://www.bkjia.com/PHPjc/486466.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/486466.htmlTechArticleWhen I ran the jQuery code in the book today, I don’t know whether it was a mistake in the book or my jQuery version. The problem is that there is a jQuery function in the example above that does not exist, which is the contains function...