Vue2.0实现自适应分辨率

import '@/utils/flexibleEx.js'

(function(win, lib) {  var doc = win.document  var docEl = doc.documentElement  var metaEl = doc.querySelector('meta[name="viewport"]')  var flexibleEl = doc.querySelector('meta[name="flexible"]')  var dpr = 0  var scale = 0  var tid  var flexible = lib.flexible || (lib.flexible = {})   if (metaEl) {    console.warn('将根据已有的meta标签来设置缩放比例')    var match = metaEl      .getAttribute('content')      .match(/initial/-scale=([/d/.]+)/)    if (match) {      scale = parseFloat(match[1])      dpr = parseInt(1 / scale)    }  } else if (flexibleEl) {    var content = flexibleEl.getAttribute('content')    if (content) {      var initialDpr = content.match(/initial/-dpr=([/d/.]+)/)      var maximumDpr = content.match(/maximum/-dpr=([/d/.]+)/)      if (initialDpr) {        dpr = parseFloat(initialDpr[1])        scale = parseFloat((1 / dpr).toFixed(2))      }      if (maximumDpr) {        dpr = parseFloat(maximumDpr[1])        scale = parseFloat((1 / dpr).toFixed(2))      }    }  }   if (!dpr && !scale) {    var isAndroid = win.navigator.appVersion.match(/android/gi)    var isIPhone = win.navigator.appVersion.match(/iphone/gi)    var devicePixelRatio = win.devicePixelRatio    if (isIPhone) {      // iOS下，对于2和3的屏，用2倍的方案，其余的用1倍方案      if (devicePixelRatio >= 3 && (!dpr || dpr >= 3)) {        dpr = 3      } else if (devicePixelRatio >= 2 && (!dpr || dpr >= 2)) {        dpr = 2      } else {        dpr = 1      }    } else {      // 其他设备下，仍旧使用1倍的方案      dpr = 1    }    scale = 1 / dpr  }   docEl.setAttribute('data-dpr', dpr)  if (!metaEl) {    metaEl = doc.createElement('meta')    metaEl.setAttribute('name', 'viewport')    metaEl.setAttribute(      'content',      'initial-scale=' +            scale +            ', maximum-scale=' +            scale +            ', minimum-scale=' +            scale +            ', user-scalable=no'    )    if (docEl.firstElementChild) {      docEl.firstElementChild.appendChild(metaEl)    } else {      var wrap = doc.createElement('div')      wrap.appendChild(metaEl)      doc.write(wrap.innerHTML)    }  }   function refreshRem() {    const whiteList = [      '/managementKanban',      '/productionKanban',      '/controlBoard',      '/main'    ] // 不重定向白名单路由    var width = docEl.getBoundingClientRect().width    var rem = 0     var hrefList = window.location.href.split('/')    var url = hrefList[hrefList.length - 1]    var url0 = url.split('?')    var urlEnd    if (url0.length > 0) {      urlEnd = url0[0]    }    if (!whiteList.includes('/' + urlEnd)) {      if (width / dpr <= 1980 && width / dpr > 768) {        width = 1980 * dpr        rem = width / 48      } else if (width / dpr >= 5760) {        width = 5760 * dpr        rem = width / 48      } else {        width = 540 * dpr        rem = width / 20      }      docEl.style.fontSize = rem + 'px'      flexible.rem = win.rem = rem    }  }   win.addEventListener(    'resize',    function() {      clearTimeout(tid)      tid = setTimeout(refreshRem, 300)    },    false  )  win.addEventListener(    'DOMNodeInserted',    function() {      clearTimeout(tid)      tid = setTimeout(refreshRem, 50)    },    false  )  win.addEventListener(    'pageshow',    function(e) {      if (e.persisted) {        clearTimeout(tid)        tid = setTimeout(refreshRem, 300)      }    },    false  )   if (doc.readyState === 'complete') {    doc.body.style.fontSize = 12 * dpr + 'px'  } else {    doc.addEventListener(      'DOMContentLoaded',      function(e) {        doc.body.style.fontSize = 12 * dpr + 'px'      },      false    )  }   refreshRem()   flexible.dpr = win.dpr = dpr  flexible.refreshRem = refreshRem  flexible.rem2px = function(d) {    var val = parseFloat(d) * this.rem    if (typeof d === 'string' && d.match(/rem$/)) {      val += 'px'    }    return val  }  flexible.px2rem = function(d) {    var val = parseFloat(d) / this.rem    if (typeof d === 'string' && d.match(/px$/)) {      val += 'rem'    }    return val  }})(window, window['lib'] || (window['lib'] = {}))

function generateLoaders(loader, loaderOptions) {    const loaders = options.usePostCSS ? [cssLoader] : [cssLoader];     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",        publicPath: "../../"      });    } else {      return ["vue-style-loader"].concat(loaders);    }  }

module.exports = {    plugins: {        'autoprefixer': {            overrideBrowserslist: [                'Android 4.1',                'iOS 7.1',                'Chrome > 31',                'ff > 31',                'ie >= 8'            ]        },        'postcss-pxtorem': {            rootValue: 37.5,            propList: ['*']        }    }}