$(document).ready in javascript
I am new to javascript and jquery. I want to use $(document).ready to register some event handlers. For example, code like this, and my question is what javascript libraries do I need to refer to at the head of the page in order to use $(document).ready? Appreciate if anyone could provide m开发者_JAVA技巧e a simple easy to use sample to learn $(document).ready.
<script>$(document).ready(function()
{
// function implementation internals
});
</script>
thanks in advance, George
All you need is the jQuery library.
http://www.jquery.com
You can either download the library and include it from your own server or you could use one of the many CDN's which provide the library. For instance:
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
// do something useful
});
</script>
Google keeps copies of a bunch of libraries on their servers, which are pretty reliable.
Just add the following to your <head> section, and place your snippet somewhere below.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js" type="text/javascript"></script>
In summary,
Put the <script> tag provided by sje397 in the <head> section of the page, which provides the only library you need... jQuery.
(Alternatively: <script src="http://code.jquery.com/jquery-1.4.4.js" type="text/javascript"></script>)
Read http://docs.jquery.com/Tutorials:How_jQuery_Works
And you should be good to go.
<html>
<head>
</head>
<body>
<div id="someElement">Click Me</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
(function($) {
$(document).ready(function() {
$('#someElement').bind('click', function(event) {
// event.preventDefault(); // you might want to do this if your event handler has a default action associated with it (e.g. a link that gets clicked with an href)
// do stuff on your event (change click to whatever you need)
});
});
})(jQuery);
</script>
</body>
</html>
加载中,请稍侯......
精彩评论