javascript ES6 Promise 用法
阿新 • • 發佈:2018-11-28
let checkLogin = () => { return new Promise((resolve, reject) => { let flag = document.cookie.indexOf('userId') > -1 ? true : false; if (flag = true){ resolve({status: 0, result: true}) } else { reject({status: -1, result: false}) } }) }; let getUserInfo = () => { return new Promise((resolve, reject) => { let userInfo = { userId: '101' }; resolve(userInfo) }) }; checkLogin().then(result => { console.log(`result: ${result}`); return getUserInfo() }).catch(error => { // console.error(`result: ${error.result}`); throw new Error(`result: ${error.result}`); }).then(res => { console.log(`userId: ${res.userId}`) }); Promise.all([checkLogin(), getUserInfo()]).then(([res1, res2]) => { console.log(`result1:${res1.result}`); console.log(`result2:${res2.userId}`) });