动态加载js文件

function loadLib(url) {
        let script = document.createElement("script");
        script.async = false;
        script.src = url;
        document.body.appendChild(script);
      }
      window.screenOrientation = "sensor_landscape"; //限制横屏展示

      //-----libs-begin-----
      loadLib("xxxx.js");
      loadLib("xxxx.js");
      loadLib("xxxx.js");
      //-----libs-end-------
      loadLib("xxxx.js");