利用device-pixel-ratio单独适配像素比

@media all
and (-moz-min-device-pixel-ratio: 1.09) and (-moz-max-device-pixel-ratio: 1.18),
    (-webkit-min-device-pixel-ratio: 1.09) and (-webkit-max-device-pixel-ratio: 1.18),
    (min-resolution: 1.09dppx) and (max-resolution: 1.18dppx) {
    :root {
        font-size: 14px;
    }
}
@media all
and (-moz-min-device-pixel-ratio: 1.19) and (-moz-max-device-pixel-ratio: 1.28),
    (-webkit-min-device-pixel-ratio: 1.19) and (-webkit-max-device-pixel-ratio: 1.28),
    (min-resolution: 1.19dppx) and (max-resolution: 1.28dppx) {
    :root {
        font-size: 13px;
    }
}
@media all
and (-moz-min-device-pixel-ratio: 1.29) and (-moz-max-device-pixel-ratio: 1.4),
    (-webkit-min-device-pixel-ratio: 1.29) and (-webkit-max-device-pixel-ratio: 1.4),
    (min-resolution: 1.29dppx) and (max-resolution: 1.4dppx) {
    :root {
        font-size: 12px;
    }
}
@media all
and (-moz-min-device-pixel-ratio: 1.41) and (-moz-max-device-pixel-ratio: 1.6),
    (-webkit-min-device-pixel-ratio: 1.41) and (-webkit-max-device-pixel-ratio: 1.6),
    (min-resolution: 1.41dppx) and (max-resolution: 1.6dppx) {
    :root {
        font-size: 10px;
    }
}
@media all
and (-moz-min-device-pixel-ratio: 1.61) and (-moz-max-device-pixel-ratio: 1.8),
    (-webkit-min-device-pixel-ratio: 1.61) and (-webkit-max-device-pixel-ratio: 1.8),
    (min-resolution: 1.61dppx) and (max-resolution: 1.8dppx) {
    :root {
        font-size: 9px;
    }
}
@media all
and (-moz-min-device-pixel-ratio: 1.81) and (-moz-max-device-pixel-ratio: 2.1),
    (-webkit-min-device-pixel-ratio: 1.81) and (-webkit-max-device-pixel-ratio: 2.1),
    (min-resolution: 1.81dppx) and (max-resolution: 2.1dppx) {
    :root {
        font-size: 8px;
    }
}

vue解决办法

mounted () {
  this.handleScreen()
  window.onresize = () => {
    this.handleScreen()
  }
},
methods: {
    handleScreen(){
      const zoom = this.detectZoom();
      console.log(zoom, 'MMMMMMMMMMMMMMM')
      const scale = 100 / Number(zoom);
      console.log('scale', scale, typeof scale)
    },
    detectZoom () {
      let ratio = 0,
        screen = window.screen,
        ua = navigator.userAgent.toLowerCase();
      if (window.devicePixelRatio !== undefined) {
        ratio = window.devicePixelRatio;
      } else if (~ua.indexOf('msie')) {
        if (screen.deviceXDPI && screen.logicalXDPI) {
          ratio = screen.deviceXDPI / screen.logicalXDPI;
        }
      } else if (window.outerWidth !== undefined && window.innerWidth !== undefined) {
        ratio = window.outerWidth / window.innerWidth;
      }
      if (ratio) {
        ratio = Math.round(ratio * 100);
      }
      return ratio;
    },
  }

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