``` function loadImg(src) { var promise = new Promise(function (resolve, reject) { var img = document.createElement('img') // throw new Error('.....') img.onload = function () { resolve(img) } img.onerror = function () { reject('图片加载失败') } img.src = src }) return promise } ``` ``` var src1 = 'https://www.imooc.com/static/img/index/logo_new.png' var result1 = loadImg(src1) var src2 = 'https://img1.mukewang.com/545862fe00017c2602200220-100-100.jpg' var result2 = loadImg(src2) Promise.all([result1, result2]).then(function (datas) { console.log('all', datas[0]) console.log('all', datas[1]) }) Promise.race([result1, result2]).then(function (data) { console.log('race', data) }) ```