Selecting an element in iFrame jQuery

问题

In our application, we parse a web page and load it into another page in an iFrame. All the elements in that loaded page have their tokenid-s. I need to select the elements by those tokenid-s. Means - I click on an element on the main page and select corresponding element in the page in the iFrame. With the help of jQuery I\'m doing it in the following way:

function selectElement(token) {
     $(\'[tokenid=\' + token + \']\').addClass(\'border\'); 
}

However with this function I can select the elements in the current page only, not in the iFrame. Could anybody tell me how can I select the elements in the loaded iFrame?

Thanks.

回答1:

var iframe = $('iframe'); // or some other selector to get the iframe
$('[tokenid=' + token + ']', iframe.contents()).addClass('border');

Also note that if the src of this iframe is pointing to a different domain, due to security reasons, you will not be able to access the contents of this iframe in javascript.

回答2:

Take a look at this post: http://praveenbattula.blogspot.com/2009/09/access-iframe-content-using-jquery.html

$("#iframeID").contents().find("[tokenid=" + token + "]").html();

Place your selector in the find method.

This may not be possible however if the iframe is not coming from your server. Other posts talk about permission denied errors.

jQuery/JavaScript: accessing contents of an iframe

回答3:

when your document is ready that doesn't mean that your iframe is ready too,
so you should listen to the iframe load event then access your contents:

$(function() {
    $("#my-iframe").bind("load",function(){
        $(this).contents().find("[tokenid=" + token + "]").html();
    });
});

回答4:

If the case is accessing the IFrame via console, e. g. Chrome Dev Tools then you can just select the context of DOM requests via dropdown (see the picture).

回答5:

here is simple JQuery to do this to make div draggable with in only container :

$("#containerdiv div").draggable( {containment: "#containerdiv ", scroll: false} );

来源：https://stackoverflow.com/questions/6316979/selecting-an-element-in-iframe-jquery