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I have a fixed-width web page (640 pixels wide). I would like this page to shrink to the width of a mobile device. However, if the device's native width is larger than 640 pixels, I do not want it stretched. Seems simple enough:
<meta name="viewport" content="width=640, maximum-scale=1.0" />
This works as expected in iPad/iPhone. However, on an Android tablet (ex. in landscape mode), the content gets scaled up to fit the display. In other words, Android is simply ignoring maximum-scale=1 . You can see an example page with the problem here. For the sake of completeness here is the source:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Test Viewport</title>
<meta name="viewport" content="width=640, maximum-scale=1.0" />
<style>
div.bar {
position: absolute;
width: 636px;
height: 50px;
background-color: yellow;
border: 2px solid black;
left: 50%;
margin-left: -320px;
}
</style>
</head>
<body>
<div class="bar">
</div>
</body>
</html>
I've been doing a lot of researching and experimentation with the viewport meta-tag. I've read just about everything on the topic, but haven't seen this seemingly basic issue mentioned.
Two notes:
This is not a target-densitydpi issue
Setting the viewport width to device-width is not helpful in this case because the content width is fixed and larger than (for example) a phone's portrait device width. If I set width=device-width, the page will not automatically be scaled down to fit the phone..
Thanks much.
640
Setting the viewport meta tag lets you control the width and scaling of the viewport so that it's sized correctly on all devices.
Viewport Changes Viewport meta tags using "width=device-width" cause the page to scale down to fit content that overflows the viewport bounds. You can override this behavior by adding "shrink-to-fit=no" to your meta tag as shown below. The added value will prevent the page from scaling to fit the viewport.
The HTML Viewport meta tag is used for creating responsive website. So that web page can adjust its width according to viewport.
Generally, meta elements (including viewport) should be placed in the document's <head> . CSS rules should either be added to a CSS stylesheet and referenced with a <link> element or, if you're not using stylesheets for some reason, in a <style> element (also in the document's <head> ).
After more banging my head against a table, I have found a solution:
Unfortunately it seems that iOS and Android simply behave differently (Android is very clearly not doing what the spec says by ignoring maximum-scale). The solution is to specialize based on resolution using JavaScript:
If the screen width (see note below) is greater than or equal to the fixed page width (640 in my example), then set the viewport meta-tag's content width to the screen width
Else set the viewport meta-tag's content width to fixed page width (640)
Presto. Lame that it requires JavaScript specialization, but such is life.
Note that the Javascript screen.width on iPad/iPhone is incorrect if the device is landscape mode (the iPad still reports the portrait width instead of the landscape width, unlike Android which gets it right in this case!). Therefore, you'll need to check window.orientation on iPad/iPhone and use screen.height instead of screen.width if you are in landscape.
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