const baseSize = 32
// 設(shè)置 rem 函數(shù)
function setRem () {
 // 當(dāng)前頁(yè)面寬度相對(duì)于 750 寬的縮放比例，可根據(jù)自己需要修改。
 const scale = document.documentElement.clientWidth / 750
 // 設(shè)置頁(yè)面根節(jié)點(diǎn)字體大小
 document.documentElement.style.fontSize = (baseSize * Math.min(scale, 2)) + 'px'
}
// 初始化
setRem()
// 改變窗口大小時(shí)重新設(shè)置 rem
window.onresize = function () {
 setRem()
}

 "postcss-pxtorem": {
 "rootValue": 32,
 "propList": ["*"]
 }

<template>
 <div class="hello">
 test
 </div>
</template>

<script>
 export default {
 name: 'HelloWorld',
 data() {
 return {
 msg: 'Welcome to Your Vue.js App'
 }
 }
 }
</script>

<style scoped>
 .hello {
 text-align: center;
 font-size: 20px;
 width: 300px;
 height: 400px;
 background:red;
 }
</style>

<script>
fnResize()
window.onresize = function () {
fnResize()
}
function fnResize() {
var deviceWidth = document.documentElement.clientWidth || window.innerWidth
if (deviceWidth >= 750) {
deviceWidth = 750
}
if (deviceWidth <= 320) {
deviceWidth = 320
}
document.documentElement.style.fontSize = (deviceWidth / 7.5) + 'px'
}
</script>