在先後端分離開發項目時,常常會有先後端進度不一致,可能前端界面開發已經完成,就等接口了,若是等接口出來再聯調的話時間可能會來不及。前端
這個時候,前端就能夠根據制定好的接口規範和接口文檔來mock接口數據,這樣等後端接口開發完成以後也不至於太匆忙。node
Koa 是一個由 Express 幕後的原班人馬打造的 web 框架。這裏用它來mock數據、webpack
1. 安裝koaweb
npm install koa koa-router koa-body --save-dev // 只在開發的時候用因此是--save-dev
2. 在項目目錄下新建mock文件夾,文件夾下新建server.jsnpm
const Koa = require('koa'); const router = require('koa-router')(); const koaBody = require('koa-body')(); const app = new Koa(); // log request URL: app.use(async (ctx, next) => { console.log(`Process ${ctx.request.method} ${ctx.request.url}...`); await next(); }); router.get('/', async (ctx, next) => { ctx.response.body = { a:1, b:'123' } }); router.get('/api/employees', async (ctx, next) => { ctx.response.body = { status:true, data:[ {id:'N001',name:'張珊',phonenumber:'13912341000',birth:'1998-01-08'}, {id:'N002',name:'李珊',phonenumber:'13912342000',birth:'1998-01-08'}, {id:'N003',name:'旺珊',phonenumber:'13912343000',birth:'1998-01-08'}, ], msg:'獲取數據成功' } }); router.post('/api/login',koaBody, async(ctx,next)=>{ var username = ctx.request.body.username || '', password = ctx.request.body.password || ''; console.log(`signin with username: ${username}, password: ${password}`); if (username === 'admin' && password === '123456') { ctx.response.body = { status:true, data:null, mag:'登陸成功' } } else { ctx.response.body = { status:false, data:null, mag:'用戶名或密碼錯誤' } } }) // add router middleware: app.use(router.routes()); app.listen(3000); console.log('app started at port 3000...');
3. 運行--進到mock目錄下 node server.js 或在package.json中配置 mock項而後在項目目錄運行npm run mockjson
"scripts": { "start": "set NODE_ENV=dev&&webpack-dev-server --progress --mode=development --colors", "build": "rd/s/q build && set NODE_ENV=production webpack --config ./webpack.production.config.js --progress --colors --mode=production", "mock": "node ./mock/server.js" },
打開http://localhost:3000,能夠看到get接口輸出的數據後端