Meta viewport ONLY for phones?

2019-03-27 16:58发布

站内问答 / HTML/CSS
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Is there a way to set the general responsive meta viewport () only for phones? We have a website that without that meta tag, zoomed out, looks fine on 7" and larger tablets, portrait and landscape, but it was just a bit too inconvenient on smaller devices.

So to get it working how we wanted on phones, I had to use the <meta name="viewport"> tag, which then forced some media queries to fix things on the larger devices.

Is there a way to set that meta tag on phones, and just device default zoomed out view on larger devices?

Thanks! Rich

3条回答
forever°为你锁心
2楼-- · 2019-03-27 17:40

Do you mean this <meta name="viewport">?

<meta name="viewport" content="width=device-width, user-scalable=no" />

If so, try the following script added in the <head> (taken and adapted from here):

if(navigator.userAgent.match(/Android/i)
  || navigator.userAgent.match(/webOS/i)
  || navigator.userAgent.match(/iPhone/i)
  || navigator.userAgent.match(/iPad/i)
  || navigator.userAgent.match(/iPod/i)
  || navigator.userAgent.match(/BlackBerry/i)
  || navigator.userAgent.match(/Windows Phone/i)) {
    document.write('<meta name="viewport" content="width=device-width, user-scalable=no" />');
}

This will detect if the user-agent indicates that the browser is mobile, and will write that meta viewport as required.

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再贱就再见
3楼-- · 2019-03-27 17:47

Actually, this might be a better solution: Add a script after meta viewport tag that will change the value if the screen is bigger than specified.

<meta id="testViewport" name=viewport content="width=device-width, initial-scale=1">
<script>
if (screen.width > 590) {
    var mvp = document.getElementById('testViewport');
    mvp.setAttribute('content','width=980');
}
</script>

There can be variations of this script. For example you could set the actual screen width as viewport, instead of a fixed value.

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别忘想泡老子
4楼-- · 2019-03-27 17:56

To achieve this, don't use <meta> tag and don't use @media queries inside your general .css file.

Instead, use this kind of tag:

<link rel="stylesheet" media="only screen and (max-device-width: 320px)" href="wp-content/themes/thestory/css/320.css">

And create styles for those devices in the separate .css file (like 320.css in this example).

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