前端 解决笔记本屏幕显示缩放比例125% 150%对页面布局的影响

win10默认设置150%,对页面布局的影响靠单纯的自适应是没办法解决的

问题出在device-pixel-ratio

解决方案一

css解决(复制粘贴放在样式文件中,确保被加载)

@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;
  }
}

解决方案二 

这种方式会将页面的元素进行缩放

js解决(放在入口文件中)

export const 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;
};

 比如React项目中的app.js

app.js

import { detectZoom } from '@/utils/detectZoom';

// 处理笔记本系统默认系统比例为150%带来的布局影响

const m = detectZoom();

document.body.style.zoom = 100 / Number(m);