How to get the height of an iframe with javascript

问题:

Is there a way to detect the height and width of an iframe, by executing a script from inside the iframe? I need to dynamically position some elements in the iframe according to the different height/width of the iframe.

Would there be any difference if there are multiple iframes in the same page? i.e. each iframe wants to find its own dimensions.

Javascript or jquery solutions welcomed.

Thanks!

<iframe src='http://example.com' width='640' height='480' scrolling='no' frameborder='0' longdesc='http://example.com'></iframe>

The iframes have to be embeded on other sites, and as mentioned by one of the answers below, I've hit permission problems.

回答1:

If your iframe’s page and its parent page are served from different domains (meaning you can’t access the parent page’s DOM properties from the iframe page), then I think it’s the same as when you’re trying to work out the viewport height.

For that, see:

• Get the browser viewport dimensions with JavaScript

Or possibly this:

• http://andylangton.co.uk/articles/javascript/get-viewport-size-javascript/

回答2:

Be aware that code like this:

var thisIframesHeight = window.parent.$("iframe.itsID").height();

will only be safe if the source of the iframe and parent window are from the same domain. If not you will get permission denied problems and you will have to take another approach.

回答3:

may be a bit late, as all the other answers are older :-) but... here´s my solution. Tested in actual FF, Chrome and Safari 5.0.

css:

iframe {border:0; overflow:hidden;}

javascript:

$(document).ready(function(){
    $("iframe").load( function () {
        var c = (this.contentWindow || this.contentDocument);
        if (c.document) d = c.document;
        $(this).css({
            height: $(d).outerHeight(),
            width: $(d).outerWidth()
        });
    });
});

Hope this will help anybody.

回答4:

Each <iframe> would need an id I suppose. And then inside the <iframe> you would reference it like this:

var thisIframesHeight = window.parent.$("iframe#itsID").height();

回答5:

yes, you can execute parent's window function from inside the frame, and pass parameters, like this:

window.parent.FUNC_NAME(iframe_height,iframe_width)

just remember to define function FUNC_NAME in the parent window