pc端自适应&&移动端rem适配代码

  <script>
    //设置 webview 字体大小不受系统修改而改变
    (function () {
      if (window.HiSpaceObject) {
        window.HiSpaceObject.setTextSizeNormal();
      }
    })();
    //屏幕适应
    (function (win, doc) {
      if (!win.addEventListener) return;
      var html = document.documentElement;

      function setFont() {
        var html = document.documentElement;
        var k = 2560;
        html.style.fontSize = (html.clientWidth / k) * 100 + "px";
      }

      setFont();
      setTimeout(function () {
        setFont();
      }, 300);
      doc.addEventListener("DOMContentLoaded", setFont, false);
      win.addEventListener("resize", setFont, false);
      win.addEventListener("load", setFont, false);
    })(window, document);
  </script>

const setFontSize = (minFontSize = 12, maxFontSize = 16) => {
  window.onresize = () => {
    // 7.5根据设计稿的横向分辨率/100得来
    var deviceWidth = document.documentElement.clientWidth;
    // 获取浏览器宽度
    if (deviceWidth > 750) {
      deviceWidth = 10.8 * 50;
    } else if (!deviceWidth) {
      return;
    }
    // 此时的fontSize大小为50px(375屏幕的时候)
    document.documentElement.style.fontSize = `${deviceWidth / 10.8}px`;

    // 禁止双击放大
    document.documentElement.addEventListener(
      "touchstart",
      function (event) {
        if (event.touches.length > 1) {
          event.preventDefault();
        }
      },
      false
    );
    var lastTouchEnd = 0;
    document.documentElement.addEventListener(
      "touchend",
      function (event) {
        var now = Date.now();
        if (now - lastTouchEnd <= 300) {
          event.preventDefault();
        }
        lastTouchEnd = now;
      },
      false
    );
  };
};
export default {
  setFontSize,
};

import Rem from "./utils/rem";


Rem.setFontSize();