


Example tutorial on mock.js random data and using express to output json interface
Front-end projects will all use the back-end interface, but when the back-end interface is not written well, you can use mock.js to randomly generate some fake data to debug the page. This article mainly introduces the implementation method of using mock.js random data and using express to output json interface. Friends in need can refer to it. I hope it can help everyone.
Install mock.js
First use express to create a nodejs web project. If the name is demo, I won’t go into it here
yarn add mockjs
Use
const Mock = require('mockjs') var data = Mock.mock({ 'list|2': [{ 'id|+1': 1, 'color': '@color()', 'date': '@datetime()', 'img': '@image()', 'url': '@url(http)', 'email': '@email()', 'name': "@name(1,2)", 'text': '@paragraph()' }] }) console.log(JSON.stringify(data))
The above random method can be found in the link to the mockjs document given at the bottom. The method called by Mock.Random can be used directly by adding @ in front. It is very convenient.
Output
{ "list": [ { "id": 1, "color": "#8179f2", "date": "2015-06-22 12:10:08", "img": "http://dummyimage.com/250x250", "url": "http://hwujcvh.fk/vfrjfmi", "email": "y.ahbatuekk@mbkhfybrh.pl", "name": "James Ronald Rodriguez", "text": "Zsogshtw qjscoe qwggnfk ppbdpqd avftd pvczrvnu gsyfyefm rbnbjyy tgemy buple ieghyjp klcxauofu lhjmnb kjpyodk. Njync ysrvx jevei stawy mcosrlpo iacryqob wkkcfuh nkrrdutr zduikjvtf dcv pppbhi ygjnkmg xvpusp ayu lvu. Wgqmtwvo ibqzp cct kodyh ovz slo cpc uqaseuwv ubjgbf hihh oudly mooztiojpi tubmwhsmb kktbkyqp hsvwgoluu jrkosqudm. Wpumdvtw riytwoa sbittrr xtjy beorkb osnjpigntu ndrgxhozeq iufhu hpuirgmh lstoijpqx hopk lkxceqhvr uymj pgdms njjmu ivxijmokn." }, { "id": 2, "color": "#94f279", "date": "1980-02-20 19:46:44", "img": "http://dummyimage.com/336x280", "url": "http://voyqj.cx/jjyksqzur", "email": "k.ydgui@gixl.cr", "name": "Ronald Nancy Harris", "text": "Lbdpwqwpgd sodipqu oncnnyis ebtwho dnbt fqxnjyzr qtrriop gfbjt prto dgmtgff gwaqnhon sdlvpxpj pqomfflsc skj. Cvteunoj oqmjnfm vowvmw ypywtr klcazkvg cvsyzayytl bgvywe kfqqzhfg iahm jwury xsgf xnr pvfxwhaed nauookwi xuxtgnwq flcbmnrm qglgziy vegml. Cexit vdotefuj nptmei hekmljnt bukxrd ndhj lkfyjcv oldpgo rrj kprfklt nfks yvrvc. Aynbyd hxguza ftjrn kmlirqo wxald jqjkvahim jnhezpgm usev qbynwhm yotehgkwdg eyxj vfnm icchnds dgmd odxajing vqrdl yhpp eba. Tykxnhe njod bslwbsjcj rwlv rkvxk rypew fpfqrqi psislxuwgs jcwrbtfn qeszy leovhc jwupwzo kitct nhbdhjq xyiajxms. Gfgkw nnlg drcqnpwn bowqknwy oiw yysaohk fqqsbgvp mulik vusikwv nbp kpbo nhti dhf hrgql." } ] }
Integrated into express to output json
const Mock = require('mockjs') exports.index = function(req, res) { var data = Mock.mock({ 'list|2': [{ 'id|+1': 1, 'color': '@color()', 'date': '@datetime()', 'img': '@image()', 'url': '@url(http)', 'email': '@email()', 'name': "@name(1,2)", 'text': '@paragraph()' }] }) // 延时1秒,模拟网络请求时间 setTimeout(function() { res.send(JSON.stringify(data)) }, 1000); }
express cross-domain
The interface address will definitely be different from the front-end project address. At this time, requesting the interface will involve cross-domain issues. , the solution in express is as follows
app.all('*', function(req, res, next) { res.header("Access-Control-Allow-Origin", "http://localhost:8080"); res.header("Access-Control-Allow-Headers", "X-Requested-With"); res.header("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS"); res.header("X-Powered-By",' 3.2.1') res.header("Content-Type", "application/json;charset=utf-8"); res.header('Access-Control-Allow-Credentials', true); next(); });
Explanation: The above code was found online, but the sentence res.header('Access-Control-Allow-Credentials', true);## was not found online.
#The address of my front-end project is http://localhost:8080, so the value of Access-Control-Allow-Origin is http://localhost:8080It can be modified according to your own server. Related recommendations:Express and mockjs realize the simulation background data sending function example sharing
Detailed explanation of using nodejs+express to implement simple files Upload function
Detailed explanation of node.js using websocket based on express
The above is the detailed content of Example tutorial on mock.js random data and using express to output json interface. For more information, please follow other related articles on the PHP Chinese website!

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.

C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.

JavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.

The main uses of JavaScript in web development include client interaction, form verification and asynchronous communication. 1) Dynamic content update and user interaction through DOM operations; 2) Client verification is carried out before the user submits data to improve the user experience; 3) Refreshless communication with the server is achieved through AJAX technology.

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Dreamweaver Mac version
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

WebStorm Mac version
Useful JavaScript development tools