How to install vue.js

How to install vue.js: First download and install node from the [node.js] official website; then run the command "npm install -g vue-cli" on the command line to install the vue cli scaffolding building tool; finally, in In the project directory, just run the command "npm run dev".

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The operating environment of this tutorial: windows7 system, Vue3 version. This method is suitable for all brands of computers.

How to install vue.js:

1. Install node.js

Download and install node from the node.js official website

The installation process is very simple, just keep clicking Next and it will be OK.
1.1 We open the command line tool (win R) and enter
node -v to check the version of node. If the corresponding version number appears, it means you have successfully installed it 1.2.npm The package manager is integrated in node, so if you install node, you will have npm. Directly enter the
npm -v command to display the npm version information.
Now that the node environment has been installed, the npm package manager is also available. I heard that because some npm resources are blocked or are foreign resources, npm often fails to install dependent packages. So we also need the domestic image of npm----cnpm (Taobao image)
2. Install cnpm
Enter
npm install -g cnpm --registry=https://registry on the command line .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 You can use cnpm instead of npm to install dependency packages.

3. Install the vue-cli scaffolding building tool

Run the command
npm install -g vue-cli on the command line and wait for the installation to complete. As shown below:

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

First we need to choose the location to store the project (here I will enter the E drive, you can also enter other drive letters to create) Use the DOS command

e:First go to my E drive, and then enter dir to view all files and folders in all E drives (you can see that there is no NodeDemo folder on E drive)
2. Next we Start creating a new folder (here I will put the created NodeDemo folder on the E drive, you can also choose other drive letters to store the demo) Enter
md NodeDemo and press the Enter key. Note There is a space after md. Then you can use dir to check whether the folder has been created: as shown below (I have created it)
3. Then use the
cd command to Directory changes to the selected directory: as shown below
In the NodeDemo directory, run the command
vue init webpack firstApp in the command line. 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 NodeDemo directory). When running the initialization command, the user will be asked to enter There are several basic configuration options, such as project name, project description, and author information. For some information that you don’t understand or don’t want to fill in, you can just press Enter to fill it in, as shown below:

After waiting for a while, it will show that the created project was successfully created, as shown below

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

Open the firstApp project. The directories in the project are as follows:

Introduce the directories and their functions:

• build: final The location where published code is stored.

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

• node_modules: Project dependent modules loaded by npm, (dependent resources required by the entire project)

• src: This is the main directory for our development , basically everything to be done is in this directory, which contains several directories and files:

• assets: Place some pictures, such as logos, etc.

• components: A component file is placed in the directory, and it does not need to be used.

• App.vue: Project entry file, we can also write components here instead of using the components directory.

• main.js: The core file of the project

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

• test: Initial test directory, you can delete

• .XXXX file: configuration file.

• index.html: Home page entry file, you can add some meta information or statistical code or something.

• package.json: Project configuration file.

• README.md: Project description file.

This is the directory structure of the entire project. Among them, we mainly make changes in the src directory.
(If you create a vue project for the first time, it seems that the node_modules dependency package resource will not be available. Anyway, if it is not available, just cnpm install will install the dependency.) My project now has node_modules after it is created. There is no need to cnpm install to install the dependent package resources if you already have the dependent package resource folder.

To install the dependencies required for the project, first cd and enter the firstApp folder

Then: execute cnpm install (cnpm can be used instead of npm here)

After the installation is completed, we go to our project to see (if not) there will be an additional node_modules folder, which contains the dependency package resources we need.

After installing the dependent package resources, we can run the entire project. Before running the project, be sure to ensure that the dependent package resources exist

Run the project

In the project directory, run the command npm run dev, which will run our application using hot loading. Hot loading allows After modifying the code, we can see the modified effect in real time without manually refreshing the browser.

After the project is started, enter the address after the project is started in the browser: localhost:8080
The vue logo will appear in the browser:

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