Chrome设备模式仿真媒体查询无效

For some reason device emulation mode is not reading my media queries. It works on other sites including my own sites that I made with bootstrap, but it's not working on media queries I am using from scratch (clicking the media queries button turns the button blue but no media queries are displayed). Test file below. Is this a bug in Chrome or is there something I need to change in my file?

由于某种原因，设备模拟模式不会读取我的媒体查询。它适用于其他网站，包括我自己使用bootstrap创建的网站，但它不能处理我从头开始使用的媒体查询（单击媒体查询按钮会将按钮变为蓝色但不显示媒体查询）。测试文件如下。这是Chrome中的错误还是我需要在文件中更改某些内容？

<!DOCTYPE html>
<!--
Media Queries Example 1
Sam Scott, Fall 2014
-->
<html>
<head>
    <title>MQ Example 1</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
        body { font-family: sans-serif; }
        h1 { color: red; } 
        h2 { color:blue; }
        p { color:green; }

        @media (max-width: 768px) and (min-width: 481px) {
            h1 { color: green; } 
            h2 { color:red; }
            p { color:blue; }
        }

        @media (max-width:479px), print { 
            h1,h2,p { color:black; }
        }

        @media print {
            body { font-family: serif; }
        }


    </style>
</head>
<body>
    <h1>I'm a first level heading</h1>
    <p>I'm a paragraph.</p>
    <h2>I'm a second level heading</h2>
    <p>I'm another paragraph.</p>
</body>
</html>

2 个解决方案

#1

122

I fixed this problem by adding a meta tag to my page:

我通过在页面中添加元标记来解决此问题：

 <meta name="viewport" content="width=device-width">

#2

Device emulation in Chrome is still a WIP. To be honest I think they pushed it to Chrome a little too soon. Try using Canary (the chrome beta browser) to test the emulation, I find that it's working way better than the one in Chrome.

Chrome中的设备模拟仍然是WIP。老实说，我认为他们很快就将它推向了Chrome。尝试使用Canary（chrome beta浏览器）来测试模拟，我发现它的工作方式比Chrome中的更好。

#1

122

I fixed this problem by adding a meta tag to my page:

我通过在页面中添加元标记来解决此问题：

 <meta name="viewport" content="width=device-width">

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Chrome设备模式仿真媒体查询无效

2 个解决方案

#1

#2

#1

#2

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