vue 移动端适配方案详解

 <script>
  (function () {
   // 在标准 375px 适配下，100px = 1rem;
   var baseFontSize = 100; 
   var baseWidth = 375;

   var set = function () {
    var clientWidth = document.documentElement.clientWidth || window.innerWidth;

    var rem = 100;
    if (clientWidth != baseWidth) {
     rem = Math.floor(clientWidth / baseWidth * baseFontSize);
    }

    document.querySelector('html').style.fontSize = rem + 'px';
   }
   set();

   window.addEventListener('resize', set);
  }());
  
 </script>

npm i lib-flexible --save    // 载lib-flexible
npm install px2rem-loader    // 安装px2rem-loader

import 'lib-flexible/flexible'

<meta name="viewport" content="width=device-width,initial-scale=1.0">
//注意这两个的区别，建议添加下面的meta，反正点击输入框，页面自动缩放
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">

const cssLoader = {
  loader: 'css-loader',
  options: {
   minimize: process.env.NODE_ENV === 'production',
   sourceMap: options.sourceMap
  }
 }
 const px2remLoader = {
  loader: 'px2rem-loader',
  options: {
   //一般设置75
   remUnit: 35
  }
 }

 function generateLoaders(loader, loaderOptions) {
  const loaders = options.usePostCSS ? [cssLoader, postcssLoader,px2remLoader] : [cssLoader,px2remLoader]

  if (loader) {
   loaders.push({
    loader: loader + '-loader',
    options: Object.assign({}, loaderOptions, {
     sourceMap: options.sourceMap
    })
   })
  }

  // Extract CSS when that option is specified
  // (which is the case during production build)
  if (options.extract) {
   return ExtractTextPlugin.extract({
    use: loaders,
    fallback: 'vue-style-loader'
   })
  } else {
   return ['vue-style-loader'].concat(loaders)
  }
 }

npm run dev  // 重新运行