Media queries fail inside IE9 iframe

2019-01-22 19:50发布

站内问答 / HTML/CSS
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I have the following media queries in my CSS:

@media screen and (min-width: 0px) and (max-width: 319px) {
    body {background-color:red;}
}

@media screen and (min-width: 320px) and (max-width: 480px) {
    body {background-color:orange;}
}

@media screen and (min-width: 481px) and (max-width: 980px) {
    body {background-color:yellow;}
}

@media screen and (min-width: 981px) and (max-width: 1200px) {
    body {background-color:green;}
}

@media screen and (min-width: 1201px) {
    body {background-color:blue;}
}

and five iframes at corresponding sizes:

<iframe frameBorder="0" src="index.html" height="320" width="255" ></iframe>

The queries kick-in fine in the standalone html file, but when viewed in an iframe context, they fail in IE9. All other browsers display OK.

Anyone know why? thanks

[edit] For the record, the parent and child html have the same docType, and the CSS is being served as text/css.

5条回答
\"骚年 ilove
2楼-- · 2019-01-22 20:24

Had the same Probleme. However I found an easy fix. Using JS to create the iframes I just appended something like ?nocache=Math.random() to the iframe src. That fixed it for me :)

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ら.Afraid
3楼-- · 2019-01-22 20:30

I had this problem with IE9. The parent page didn't have a doctype declared.
Adding an html5 doctype (<!DOCTYPE html>) in the parent page solved the problem.

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男人必须洒脱
4楼-- · 2019-01-22 20:31

Not a real answer but could help somebody else find a work around for this bug in IE.

Page containing iframes

<link href="style.css" rel="stylesheet">

Iframe pages

<link href="style.css?frameX" rel="stylesheet">

The param frameX prevents IE from caching the css page and thus the iframe has responsive layout independently from the other pages. This is just a hack(horrible one) and to help somebody else find the answer to this problem.

Sample files

Index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="style.css" rel="stylesheet">
</head>
<body>
  <p></p>

  <hr>
  250px frame
  <iframe frameBorder="0" src="frame1.html" height="100" width="250" id='frame_1'></iframe>  

  <hr>
  350px frame
  <iframe frameBorder="0" src="frame2.html" height="100" width="350" id='frame_2'></iframe>  

  <hr>
  390px frame
  <iframe frameBorder="0" src="frame3.html" height="100" width="390" id='frame_3'></iframe>  

</div>
</body>

frame1.html

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="style.css?page=frame1" rel="stylesheet">
</head>
<body>
  <p></p>
</body>
</html>

frame2.html

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="style.css?page=frame2" rel="stylesheet">
</head>
<body>
  <p></p>
</body>
</html>

frame3.html

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="style.css?page=frame3" rel="stylesheet">
</head>
<body>
  <p></p>
</body>
</html>

style.css

iframe{display:block;}

@media (max-width: 8000px)
{
  body p:before {content: "bigger than 550px";}
}

@media (max-width: 550px)
{
  body p:before {content: "max550";}
}

@media (max-width: 450px)
{
  body p:before {content: "max450";}
}

@media (max-width: 350px)
{
  body p:before {content: "max350";}
}


@media (max-width: 250px)
{
  body p:before {content: "max250";}
}
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来，给爷笑一个
5楼-- · 2019-01-22 20:33

You most likely aren't going to be able to fix this. Media Queries are based on viewport size and I imagine IE isn't treating the iFrame as a fully fledged viewport in this context.

Your best bet would most likely be to add a bit of JavaScript that detects the size and adds a class to the at the same thresholds you are using for your responsive design. This would also give you backwards compatibility with browsers that don't support media queries.

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爷的心禁止访问
6楼-- · 2019-01-22 20:39

Here's what I did:

  • using jQuery...
  • get all iframes on the page
  • onload of each iframe find all the stylesheet links
  • for each stylesheet grab the url and append a random num 'nocache' querystring to it
  • create a new stylesheet link tag and append it to the head
  • done.

Here's the code:

// This forces the media queries to run in IE iframes, by waiting for the iframes to load and then,
// re-getting/applying the stylesheet
(function($){
    // Get each of the iframes on this page
    $('iframe').each(function(index){
        // On load of each iframe:
        $(this).on('load', function(){
            var iframeDoc = $(this).contents();

            // For each stylesheet reference found:
            iframeDoc.find('link[rel="stylesheet"]').each(function(){
                // Get the current stylesheet's url and add a 'nocache' random num query string to it
                var cssURL = $(this).attr('href');
                cssURL += (cssURL.indexOf('?') != -1)? '&':'?';
                cssURL += 'nocache=' + (Math.random() + index);

                // Create a new stylesheet link tag and append it to the head
                $("<link/>", {
                    rel: "stylesheet",
                    type: "text/css",
                    href: cssURL
                }).appendTo(iframeDoc.find('head'));
            });

        });
    });
})(jQuery);
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