Programmer Group

1. Data type 1.1 classification 1. Basic (value) type typeBrief descriptionStringArbitrary stringNumberArbitrary numberbooleantrue/falseundefinedundefinednullnull 2. Object (Reference) type typeType descriptionObjectAny objectFunctionA special object (executable)ArrayA special object (numeric subscript, internal data is ordered) var a ; ...

#javascript advanced programming (VI) collection type reference 1, Object How to explicitly create an object instance (1) new + constructor let person = new People(); person.name = "abc"; person.age = 27; (2) Object literal let person = { name: 'abc', age: 28 } tips: a. Numeric property names are automatically converted to strings b. Wh ...

ejs template engine The following is the simplest node.js route: handle different business logic according to different url requests import http from 'http' import url from 'url' http.createServer((req, res) => { res.writeHead(200, {'Content-Type': 'text/html;charset=utf8'}) const pathName = url.parse(req.url).pathname if (pat ...

In the previous front-end development, the front-end relies heavily on the back-end, so we must wait for the back-end interface to be developed before we can continue to develop. Using mock, the front and back end development can be carried out asynchronously without affecting each other. Mock.js is an analog data generator. It can intercept aj ...

#javascript advanced programming (VI) collection type reference 1, Object How to explicitly create an object instance (1) new + constructor let person = new People(); person.name = "abc"; person.age = 27; (2) Object literal let person = { name: 'abc', age: 28 } tips: a. Numeric property names are automatically converted to strings b. Wh ...

Auxiliary submission tool Because you need to use the commit tool to assist in submitting information npm install commitizen -g Then you need to install the node environment first use Under project directory # npm init is required first commitizen init cz-conventional-changelog --save --save-exact Submit using git cz The specification ...

Recently done mobile terminal project, packaging PDF Preview component, colleagues started using vue-pdf To preview and step on the pit again and again, we basically encounter three problems: 1,PDF Chinese not displayed 2,PDF If the signature is not displayed, the console prompts: Warning: Unimplemented widget field type "Sig", falling back to ...

1. Common methods of path a. Path module (path) Encapsulates various path related operations Like Buffer, the path in NodeJS is also a special module The difference is that the Buffer module has been added to Global,   Therefore, manual import is not required The Path module was not added to Global,   Therefore, manual import is ...

Introduction to express Express is a third-party module used to quickly build the server (instead of http module)   Express is a fast, open and minimalist web development framework based on Node.js platform. Express retains the basic API of http module. When using express, you can also use http API express also encapsulates some new me ...

post interface without parameters const express = require('express'); const app = express(); app.post('/api/post', function(req, res) { // Direct return object res.send({ name: 'abc' }); }); app.listen('8088', () => { console.log('8088'); });   After starting the terminal, use postman to test the post interface~     I ...