define(["dom"],function(dom){"use strict";function loadImage(elem,url){return elem?"IMG"!==elem.tagName?(elem.style.backgroundImage="url('"+url+"')",Promise.resolve()):loadImageIntoImg(elem,url):Promise.reject("elem cannot be null")}function loadImageIntoImg(elem,url){return new Promise(function(resolve,reject){dom.addEventListener(elem,"load",resolve,{once:!0}),elem.setAttribute("src",url)})}return{loadImage:loadImage}});