AdobeCepLoadSample.js

window.onload = ()=>{
  `use strict`;
  const csInterface = new CSInterface();  
  themeManager.init();
  const btn_test = document.getElementById(`btn_test`);
  const loading = document.getElementById(`loading`);

  btn_test.addEventListener(`click`,saveJpegs);
  async function saveJpegs(){
    loading.style.display = `block`;
    await adjustTime();//ロード画面を表示させるため少し間を空ける
    csInterface.evalScript(`saveJpeg()`,(result)=>{
      console.log(result);
      loading.style.display = `none`;
    });//メインjsxの関数を呼び出す
  }

  function adjustTime(){
    return new Promise(resolve=>{
      setTimeout(()=>{
        resolve();
      },100);
    });
  }
}