前端换肤 - 掘金

1.替换css文件

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <link id="css" rel="stylesheet" href="./red.css">
</head>
<body>
  <div>aaa</div>
  <button onclick="changeTheme('red')">red</button>
  <button onclick="changeTheme('black')">black</button>
  <script>
    function changeTheme(theme) {
      var css=document.getElementById("css");
      css.setAttribute("href", './' + theme + '.css');
    }
  </script>
</body>
</html>

// red.css
div{
  color: red;
}


// black.css
div{
  color: black;
}

2. 使用CSS3自定义属性实现换肤功能

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>CSS3自定义属性实现换肤功能</title>
    <style type="text/css">
        :root{
            --theme-color:#989898;
        }

        #header{
            width: 100%;
            height: 50px;
            line-height: 50px;
            background-color: var(--theme-color);
            margin-bottom: 30px;
        }
        #header h1{
            color: #fff;
        }
        button{
            width: 100px;
            height: 30px;
            color: #fff;
            border:none;
        }
        #btn-red{
            --btn-red:red;
            background-color: var(--btn-red)
        }
        #btn-black{
            --btn-black:black;
            background-color: var(--btn-black)
        }
        #btn-blue{
            --btn-blue:blue;
            background-color: var(--btn-blue)
        }
    </style>
</head>
<body>
    <header id="header">
        <h1>CSS3自定义属性实现换肤功能Demo</h1>  
    </header>

    <div>
        <button id="btn-red">red</button>
        <button id="btn-black">black</button>
        <button id="btn-blue">blue</button>
    </div>

    <script type="text/javascript">
        var btns = document.getElementsByTagName("button");
        for(var i=0;i<btns.length;i++){
            btns[i].addEventListener("click",function(e){
                var ele = e.target||e.srcElement;
                var styles = getComputedStyle(ele);
                var value = styles.getPropertyValue("--"+ele.id);
                document.documentElement.style.setProperty("--theme-color",value);
            })
        }

    </script>
</body>
</html>

3. link rel=alternate网站换肤功能最佳实现

参考： www.zhangxinxu.com/wordpress/2…

兼容性： ie9+

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <link href="default.css" rel="stylesheet" type="text/css" title="默认">
  <link href="red.css" rel="alternate stylesheet" type="text/css" title="红色">
  <link href="black.css" rel="alternate stylesheet" type="text/css" title="黑色">
</head>
<body>
  <div>aaa</div>
  <input id="default" type="radio" name="skin" value="default.css" checked>
  <input id="red" type="radio" name="skin" value="red.css">
  <input id="black" type="radio" name="skin" value="black.css">
  <script>
    var eleLinks = document.querySelectorAll('link[title]');
    var eleRadios = document.querySelectorAll('[type="radio"]');
    [].slice.call(eleRadios).forEach(function (radio) {
        radio.addEventListener('click', function () {
            var value = this.value;
            [].slice.call(eleLinks).forEach(function (link) {
                link.disabled = true;
                if (link.getAttribute('href') == value) {
                    // 该样式CSS文件生效
                    link.disabled = false;
                }
            });
        });
    });
  </script>
</body>
</html>

4. less.modifyVars修改样式

antd就是采用这种方案

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <link rel="stylesheet/less" type="text/css" href="less.less" />
  <script src="https://cdnjs.cloudflare.com/ajax/libs/less.js/2.7.2/less.min.js"></script>
</head>
<body>
  <div class='test-block'>aaa</div>
  <button onclick='changeColor("#f00")'>red</button>
  <button onclick='changeColor("#0f0")'>green</button>
  <script>
    function changeColor(color) {
        window.less
          .modifyVars({  // 调用 `less.modifyVars` 方法来改变变量值
              '@primary-color': color,
              '@bg-color': '#2f54eb',
          });
    }

  </script>
</body>
</html>

5. Element-UI换肤

可以参考 github.com/forkev/them…

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <link id="css" rel="stylesheet" href="./default.css">
  <style></style>
</head>
<body>
  <div>aaa</div>
  <button onclick="changeTheme('red')">red</button>
  <button onclick="changeTheme('black')">black</button>
  <script>
    

    function changeTheme(theme) {
      let cssText
      fetch('./default.css')
      .then(res => res.text())
      .then(source => {
        cssText = source.replace(new RegExp('#0f0', 'g'), theme)
        const style = document.createElement('style')
          style.innerText = cssText
          document.head.appendChild(style)
      })

    }
  </script>
</body>
</html>

所有源码

github.com/repototest/…

参考

www.cnblogs.com/leiting/p/1…

juejin.cn/post/684490…

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