vue scss rem自适应

该文章使用版本
"sass": "1.26.8","sass-loader": "8.0.2"
sass-loader安装失败的话，请尝试安装8.0以上版本，可能是版本不兼容

flexible.js

(function flexible(window, document) {
  var docEl = document.documentElement
  var dpr = window.devicePixelRatio || 1

  // adjust body font size
  function setBodyFontSize() {
    if (document.body) {
      document.body.style.fontSize = 12 * dpr + 'px'
    } else {
      document.addEventListener('DOMContentLoaded', setBodyFontSize)
    }
  }

  setBodyFontSize()

  // set 1rem = viewWidth / 10
  function setRemUnit() {
    // 这里默认是10等份，手动改为24，此时1rem=1920/24px即80px。（设计稿是1920px的）
    var rem = docEl.clientWidth / 24
    docEl.style.fontSize = rem + 'px'
  }

  setRemUnit()

  // reset rem unit on page resize
  window.addEventListener('resize', setRemUnit)
  window.addEventListener('pageshow', function(e) {
    if (e.persisted) {
      setRemUnit()
    }
  })

  // detect 0.5px supports
  if (dpr >= 2) {
    var fakeBody = document.createElement('body')
    var testElement = document.createElement('div')
    testElement.style.border = '.5px solid transparent'
    fakeBody.appendChild(testElement)
    docEl.appendChild(fakeBody)
    if (testElement.offsetHeight === 1) {
      docEl.classList.add('hairlines')
    }
    docEl.removeChild(fakeBody)
  }
})(window, document)

home.scss

// 1rem=80px
@function rem($px) {
  @return $px / 80 * 1rem;
}

home.js

<script>
import '@/utils/flexible'
...
</script>
<style lang="scss" scoped>
@import '@/styles/home.scss';
...
  height: rem(688);// 688px
...
</style>