How to install vue.js? The following article will introduce you to three ways to install vue.js. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

A brief discussion on three ways to install vue.js

Vue.js (pronounced /vjuː/, similar to view) is a progressive framework for building data-driven web interfaces. The goal of Vue.js is to enable responsive data binding and composed view components with the simplest possible API. Not only is it easy to get started, it is also easy to integrate with third-party libraries or existing projects.

The following introduces three installation methods of Vue.js:

1. Independent version

We can install it in Vue. Download vue.js directly from the js official website and reference it in the .html through the <script> tag. -> <script src = ../vue.js> </script> Do not use the minimally compressed version in the development environment, otherwise there will be no error prompts and warnings! (Used directly in the page)

Use vue for multi-page development:

Introduce vue.js
Create a vue root instance new Vue({option})

2. Use CDN method

BootCDN (domestic): https://cdn.bootcss.com/vue/2.2.2/vue .min.js, (domestic instability)
unpkg: https://unpkg.com/vue/dist/vue.js, will remain consistent with the latest version released by npm. (Recommended)
cdnjs: https://cdnjs.cloudflare.com/ajax/libs/vue/2.1.8/vue.min.js, such as (）

## 3.NPM method (recommended)

When building large-scale applications with Vue.js, it is recommended to use the NPM installation method. NPM can be used well with module packagers such as Webpack or Browserify. Vue.js also provides supporting tools to develop single-file components.

First, let’s list what we need next:

vue-cli scaffolding construction tool
CNPM NPM's Taobao Mirror

1) Install node.js

It's ok. After the installation is completed, we can check the node version by opening the command line tool (win R) and entering the

node -v command. If the corresponding version number appears, it means that your installation is successful.

## This so far, the environment of the NODE has been installed, and the NPM package manager also has it. Because some NPM resources are blocked or foreign resources, it often leads to NPM The installation of dependent packages failed, so we also need the domestic image of npm----cnpm.

2) Install cnpm

Enter npm install -g cnpm --registry in the command line =http://registry.npm.taobao.org , and then wait. If no error is reported, it means the installation is successful (mine has been installed, and the update success message is displayed), as shown below:

After completion, we can use cnpm instead of npm to install dependency packages. If you want to know more about cnpm, check out the Taobao npm mirror official website.

3) Install the vue-cli scaffolding building tool (must be installed globally)

Run the command npm install -g vue-cli on the command line, and then Wait for the installation to complete.

Is the installation successful: vue -V

Through the above three steps, the environment and tools we need to prepare are ready, and then we will start using vue-cli to build the project.

First we need to choose the location to store the project, and then use the command line to cd to the project directory. Here, I choose to create a new directory (NodeTest directory) under the c drive. , use cd to cut the directory to this directory, as shown below:

In the NodeTest directory, run the command vue init webpack firstApp in the command line (initialize a full version project) . Explain this command. This command means to initialize a project, where webpack is the build tool, that is, the entire project is based on webpack. where firstApp is the name of the entire project folder. This folder will be automatically generated in the directory you specify (in my example, the folder will be generated in the NodeTest directory), as shown below:

If we are in The folder where this project is stored has been manually created in the editor and cd to the project: vue init webpack; just initialize it, and also load the packages that webpack depends on:

Is it in this folder? Create it in the directory

After entering the command, we will be asked a few simple options, we can just fill them in according to our needs.

Project name: Project name, if you don’t need to change, just press Enter. Note: Capital letters cannot be used here, so I changed the name to vueclitest
Project description: Project description, the default is A Vue.js project, just press Enter, no need to write.
Author: Author, if you have configured git author, he will read it.
Install vue-router? Do you want to install vue's routing plug-in? We need to install it here, so choose Y
Use ESLint to lint your code? Do you want to use ESLint to limit your code errors and style? . We do not need to enter n here (recommendation). If you are developing in a large team, it is best to configure it.
setup unit tests with Karma Mocha? Do you need to install the unit testing tool Karma Mocha? We don’t need it here, so enter n.
Setup e2e tests with Nightwatch? Do you want to install e2e for user behavior simulation testing? We don’t need it here, so enter n

When running the initialization command, the user will be asked to enter a few Basic configuration options, such as project name, project description, and author information. For information that you don’t understand or don’t want to fill in, you can just press Enter to fill it in. After a while, the project will be created successfully, as shown below:

Next, we go to the NoteTest directory to see if the file has been created:

Open the firstApp project, in the project The directory is as follows:

Let’s introduce the directory and its function:

Build: The storage location of the final released code.

config: configure the path, port number and other information. When we first started learning, we chose the default configuration.

node_modules: Various dependent modules required by the project loaded by npm.

src: This is the main directory (source code) for our development. Basically everything we need to do is in this directory, which contains several directories and files:

assets: Place some Pictures, such as logos, etc.

components: The directory contains component files one by one

router/index.js: Where to configure routing

App.vue: Project For entry components (with components), we can also write components here instead of using the components directory. The main function is to connect our own defined components with the page for rendering. The is essential.

Main.js: The core file of the project (the entry js of the entire project) introduces dependency packages, default page styles, etc. (an app.js file will be formed in index.html after the project is run).

static: Static resource directory, such as pictures, fonts, etc.

test: initial test directory, can be deleted

.XXXX file: configuration file.

Index.html: The entry page of a single HTML page. You can add some meta information or statistics code or page reset style, etc.

Package.json: Project configuration information file/version information of the development package it depends on and plug-in information it depends on.

README.md: Project description file.

Webpack.config.js: The configuration file of webpack, which packages .vue files into files that the browser can read.

.babelrc: It is the configuration of the file that detects es6 syntax

.getignore: Ignore the configuration of the file (such as simulating local data mock and not allowing it to be submitted/packaged in get Ignore it when going online. If you don’t use it, you can configure it here)

.postcssrc.js: Prefix configuration

.eslintrc.js: Configure eslint syntax rules (configure it in the rules attribute) Which grammar rule is invalid)

.eslintignore: Ignore eslint’s check of the grammar rules of certain files in the project

This is the directory structure of the entire project, among which, we mainly Make modifications in the src directory (modular development). This project is still just a structural framework, and all the dependent resources required for the entire project have not been installed yet.

cd project name; enter the project

Install the dependency packages/plug-ins required for the project (viewable in package.json): execute cnpm install (npm may There is a warning. You can use cnpm instead of npm here. To run other people's code, you need to install dependencies first)If no error is reported when creating the project, this step can be omitted. If an error is reported, cd to the project and run cnpm install / npm install

#If you get other people's projects or projects downloaded from gethub, the first step is to cnpm install; download in the project Plug-ins that the project depends on, and then npm run dev to run the project

After the installation is completed, we go to our own project to see that there will be an additional node_modules folder. Here are the dependency package resources we need.

After installing the dependent package resources, we can run the entire project.

Run the project

In the project directory, run the command npm run dev (npm run start), you will use Run our application with hot loading. Hot loading allows us to see the modified effect in real time without manually refreshing the browser after modifying the code.

After the project is started, enter the address after the project is started in the browser:

It will be displayed in the browser The vue logo appears:

At this point, the three installation methods of vue have been introduced.

After the project is completed, enter the packaging command: cnpm run build; a dist file will be generated, which is our packaging file. If you click on the .html file to run it, it will be successful.

1. Build the development environment of vue (outline)

Must install node.js
Build the development environment of vue, install the scaffolding tool of vue Official command line Tool

npm install - -global vue-cli

3. Create the project You must cd into the corresponding project

vue init webpack vue-demo01

cd vue-demo01

cnpm install / npm install If no error is reported when creating the project, this step can be omitted. If an error is reported, cd to the project and run cnpm install / npm install

npm run dev/npm run start

4. Another way to create projects for small and medium-sized projects (recommended) ***

vue init webpack-simple vuedemo02

cd vuedemo02

cnpm install / npm install

npm run dev

After getting someone else’s project and it cannot run normally, see if there is a node_modules file (all of the project dependencies), if there is no cd to the project to install the project dependencies: cnpm install/npm install

2. Upgrade: vue-cli3.0

1. Use vue-cli3.0

The package name of Vue CLI has been changed from vue-cli to @vue/cli
If you have installed the old version of vue-cli (3.0 globally) below), you need to uninstall it first via npm uninstall vue-cli -g/yarn global remove vue-cli.
Node.js8.9
Install vue3.0 npm install -g @vue/cli or yarn global add @vue/cli
Is the version 3.x vue --version/vue -V

Create project through vue-cli

Create project command

vue create project name; It is not recommended that the project name be in uppercase letters, separated by -

At this time, you need to pay attention to the plug-ins that need to be pre-installed to create the project:

The default will be Babel ESLint; but it is not recommended By default, the following is selected:

##? Check the features needed for your project: (Press to select, to toggle all, to invert selection)
>( ) Babel //Transcoder can convert ES6 code to ES5 code so that it can be executed in the existing environment.
( ) TypeScript// TypeScript is a superset (suffix .ts) of JavaScript (suffix .js) that includes and extends the syntax of JavaScript. It needs to be compiled and output as JavaScript to run in the browser. Currently, few people use it.
( ) Progressive Web App (PWA) Support// Progressive Web Application
( ) Router // vue-router (vue routing)
( ) Vuex // vuex (vue’s state management mode)
( ) CSS Pre-processors // CSS preprocessors (such as: less, sass)
( ) Linter / Formatter // Code style checking and formatting (such as: ESlint)
( ) Unit Testing // Unit tests (unit tests)
( ) E2E Testing // e2e (end to end) Testing