CSS 屏幕大小自适应

Question

用了这个之后按F11才全屏，不引入的话就只有1920*1080内容才是正常，不能自适应

// 屏幕适配 mixin 函数

// * 默认缩放值
const scale = {
  width: '1',
  height: '1',
}

// * 设计稿尺寸（px）
const baseWidth = 1920
const baseHeight = 1080

// * 需保持的比例（默认1.77778）
const baseProportion = parseFloat((baseWidth / baseHeight).toFixed(5))

export default {
  data() {
    return {
      // * 定时函数
      drawTiming: null
    }
  },
  mounted () {
    this.calcRate()
    window.addEventListener('resize', this.resize)
  },
  beforeDestroy () {
    window.removeEventListener('resize', this.resize)
  },
  methods: {
    calcRate () {
      const appRef = this.$refs["appRef"]
      if (!appRef) return 
      // 当前宽高比
      const currentRate = parseFloat((window.innerWidth / window.innerHeight).toFixed(5))
      if (appRef) {
        if (currentRate > baseProportion) {
          // 表示更宽
          scale.width = ((window.innerHeight * baseProportion) / baseWidth).toFixed(5)
          scale.height = (window.innerHeight / baseHeight).toFixed(5)
          appRef.style.transform = `scale(${scale.width}, ${scale.height}) translate(-50%, -50%)`
        } else {
          // 表示更高
          scale.height = ((window.innerWidth / baseProportion) / baseHeight).toFixed(5)
          scale.width = (window.innerWidth / baseWidth).toFixed(5)
          appRef.style.transform = `scale(${scale.width}, ${scale.height}) translate(-50%, -50%)`
        }
      }
    },
    resize () {
      clearTimeout(this.drawTiming)
      this.drawTiming = setTimeout(() => {
        this.calcRate()
      }, 200)
    }
  },
}
——HTML
<div id="app">
  <div id="index" ref="appRef">
      <div class="bg">
          <dv-loading v-if="loading">Loading...</dv-loading>
            <div v-else class="host-body">
          内容，，，
</div>
#app {
   width: 100%;
     height: 100%;
    background-color: #020308;
        position: absolute;
    top: 0;
    left: 0;
    overflow: hidden;
  }
——scss——
#index {
  color: #d3d6dd;
  width: auto;
  height: auto;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transform-origin: left top;
  overflow: hidden;

  .bg {
    width: 100vw;
        height: 100vh;

Answer 1

this.$nextTick(()=>{
  this.calcRate()
})