Apps Script exerpt to include images in HTML Service

include-snippet.gs

  /**
  * given an image object, it will generate an img tag 
  * @param {Object} imgData with image data
  * @return {string} of img tag or src
  */
  ns.img = function (imgData, isImgTag) {
    if (!isImgTag){
      var html = '<img ';
      Object.entries(imgData).forEach(function(k){ html += k[0]+'="'+k[1]+'" '});
      html += '>\n'
      return html
    } else {
      return imgData.src;
    }   
  };