Use webpack to make ReactApp
This time I will bring you the use of webpack to make ReactApp. What are the precautions for using webpack to make ReactApp? The following is a practical case, let’s take a look.
To learn React, you can directly create a ReactApp using the following method. This article mainly introduces how to set up this environment manually.
npm install -g create-react-app create-react-app my-app cd my-app npm start
Using Taobao NPM image
Using React and Webpack requires installing a lot of dependency packages. Without an agent, the speed will be very slow and very slow. It is easy to make mistakes, so it is recommended to use Taobao's npm image to install, the speed is very ideal.
It only takes two steps to install the npm package using Taobao mirror:
Install cnpm
npm install -g cnpm --registry=https://registry.npm.taobao.org
Use cnpm to install the package
Just replace npm Become cnpm to get high-speed downloads.
cnpm install [name]
All the commands for installing dependent packages given below are installed using cnpm. You can also use npm.
Start the first React
Initialize a json configuration file
npm init
Enter some information after executing the above command to create a json file. This file can also be created manually. The entry point needs to be filled in index.js, the rest is optional.
Install React
cnpm install react react-dom --save
Install the compilation tool babel
Copy code The code is as follows :
cnpm install babel-core babel-loader babel-preset-react babel-preset-es2015 --save-dev
Install packaging tool wepback
It is best to install both the global and current folder, so that you can package it in a fancy way.
cnpm install webpack webpack-cli --save-dev cnpm install webpack-dev-server --save-dev cnpm install webpack webpack-cli -g cnpm install webpack-dev-server -g
Configuration webpack
For convenience, all the following files are built in the same folder.
Create new webpack.config.js and add the following content
const path =require('path');
module.exports = {
entry: path.resolve(__dirname, 'index.js'),
output: {
path: path.resolve(__dirname, ''),
filename: "bundle.js"
},
mode: 'development',
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
loader: "babel-loader",
options: {
presets: ["es2015","react"]
}
}
]
}
};In webpack4, there will be a warning if the mode attribute is not specified.
Create test file
New index.js file
import React from 'react';
import ReactDOM from 'react-dom';
ReactDOM.render(
<h1>我的第一个react例子</h1>,
document.getElementById('root')
);New index.html file
<!DOCTYPE html> <html> <head> <meta charset="UTF-8" /> <title>example</title> </head> <body> <p id="root"></p> <script src="bundle.js"></script> </body> </html>
Start
Finally execute webpack to package index.js and generate a browser-executable bundle.js file. At this point, the index.html file is ready to be executed in the browser.
Attach my package.json file and directly execute cnpm install to install all dependencies.
{
"name": "myapp",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"start": "webpack",
"start:dev": "webpack-dev-server"
},
"author": "",
"license": "ISC",
"devDependencies": {
"babel-core": "^6.26.0",
"babel-loader": "^7.1.4",
"babel-preset-es2015": "^6.24.1",
"babel-preset-react": "^6.24.1",
"webpack": "^4.2.0",
"webpack-cli": "^2.0.12",
"webpack-dev-server": "^3.1.1"
},
"dependencies": {
"react": "^16.2.0",
"react-dom": "^16.2.0"
}
}Hot start
If index.js changes, you need to compile and package it again to update the bundle.js file, which is very inefficient. webpack provides a command to compile and package in real time.
webpack --watch
After executing this command, the index.js file can be dynamically compiled and packaged, which is very convenient.
However, the above hot start is still very troublesome, and you have to refresh the browser manually. There is something very awesome here.
Directly execute webpack-dev-server to automatically refresh the browser
I believe you have mastered the method after reading the case in this article. Please pay attention for more exciting things. Other related articles on php Chinese website!
Recommended reading:
What are the loop traversal instructions in vue
How does JS convert the rows and columns of two-dimensional arrays
The above is the detailed content of Use webpack to make ReactApp. For more information, please follow other related articles on the PHP Chinese website!
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