yueke/public/assets/appdown/common/resize.js

!(function(win, doc) {
    const MOBILE_WIDTH = 710 // 750 refer to Bootstrap's responsive design

    function $_getDevice() {
        const rectWidth = doc.documentElement.clientWidth
        if(rectWidth < MOBILE_WIDTH){
          return 'mobile'
        }else {
          return 'pc'
        }
    }

    function setFontSize(device) {
      var docEl = doc.documentElement;
      var winWidth = docEl.clientWidth;
      console.log("setFontSize===",device);
      if(device === 'mobile'){
        doc.documentElement.style.fontSize = (winWidth / 750) * 100 + "px";
      }else{
        doc.documentElement.style.fontSize =  1 + "px";
      }
      
    }
    var userAgent = navigator.userAgent;
    win.addEventListener("resize", function() {
      if (navigator.userAgent !== userAgent) {
        location.reload();
      }
    });
    var device = $_getDevice()
    setFontSize(device);
  })(window, document);