import Vue from 'vue'
Vue.prototype.$setTitle = function (text) {
 document.title = text
}
Vue.prototype.$getPX = function (design, designWidth = 750) { // 750为设计稿宽度
 // 获取窗口尺寸
 let width = document.documentElement.getBoundingClientRect().width
 // 计算缩放比例
 let scale = width / designWidth
 // 获取实时尺寸
 return design * scale
}

import Vue from 'vue'
import App from './App'
import router from './router'
import 'amfe-flexible'
import './utils/flex'
Vue.config.productionTip = false

new Vue({
 el: '#app',
 router,
 components: { App },
 template: '<App/>'
})

body,div,ul,ol,dl,li,dt,dd,h1,h2,h3,h4,p,form,iframe,input,textarea,a,span,em,strong,img,html,nav,header,article,button,footer,var {
 padding:0;
 margin:0;
}
body { font:12px/1.2rem "Microsoft YaHei",tahoma,arial,sans-serif;min-width:320px;position:relative; }
form,input {background:none;border:none;}
ul,dl,ol {list-style-type:none;}
h1, h2, h3, h4, h5 { font:12px/1.2rem "Microsoft YaHei",arial,tahoma; }
a { text-decoration:none; }
a:hover,a:focus { outline:none; }
table { border-collapse:collapse;border-spacing:0; }
img { border:none; }
strong,b { font-weight:normal; }
em,i,var { font-style:normal; }
p { text-indent:0; }
.clear { clear:both;height:0;line-height:0;overflow:hidden;width:0; }
.clearfix:after { clear:both;content:".";display:block;font-size:0;height:0;visibility:hidden; }
 // 尺寸转换
 @function px2rem($px, $base-font-size: 75px) { /*设计稿宽度为750，因此此处为75*/
 @if (unitless($px)) {
  @return px2rem($px + 0px); 
 } @else if (unit($px) == rem) {
  @return $px;
 }
 @return ($px / $base-font-size) * 1rem;
 }
 // 字体转换
 @mixin font-dpr($font-size) {
 font-size: $font-size;
 [data-dpr="2"] & {
  font-size: $font-size * 2;
 }
 [data-dpr="3"] & {
  font-size: $font-size * 3;
 }
 }

<style scoped lang='scss'>
 @import '../styles/common.scss';
 .content{
  width:px2rem(750); /*750为设计稿实际尺寸*/
  font-size:px2rem(20) /*20为设计稿实际尺寸*/
</style>

export default {
 name:'test',
 data() {
  return {
  w:0;
  }
 },
 watch:{
  getWidth() {
   this.w=this.$getPX(500);
  }
  }
 },
 computed: {
  fun() {
  return (this.w/this.$getPX(500)*100).toFixed(2) + '';
  }
 }
 }