Steps to use webpack-dev-server
This time I will bring you the steps to use webpack-dev-server. What are the precautions when using webpack-dev-server? Here are practical cases, let’s take a look.
webpack-dev-server
webpack-dev-server is a small Node.js Express server that uses webpack-dev-middleware to serve webpack package, in addition to this, it also has a micro runtime that connects to the server through Sock.js.
Let’s take a look at the followingconfig file(webpack.config.js )
var path = require("path");
module.exports = {
entry:{
app:["./app/main.js"]
},
output:{
path:path.resolve(dirname,"build"),
publicPath:"/assets/",
filename:"bundle.js"
}
}Here you put your source files under the app folder and package them into bundle.js under the build folder through webpack.
Note: webpack-dev -server is an independent NPM package, you can install it through npm install webpack-dev-server.
Basic directory
webpack-dev-server will be installed by default Use the current directory as the base directory, unless you specify it.
webpack-dev-server --content-base build/
The above command is executed in the command line, which will use the build directory as the root directory. One thing to note is: webpack-dev-server generates The package is not placed in your real directory, but in the memory.
We create a new index.html file in the basic directory, and then enter http://localhost in the browser: 8080 access.
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <script src="assets/bundle.js"></script> </body> </html>
Automatic refresh
webpack-dev-server supports two modes to automatically refresh the page.
iframe mode (the page is placed in an iframe and reloaded when changes occur)
inline mode (add the client entry of webpack-dev-sever to the bundle)
Both modes support Hot Module Replacement. The advantage of hot module replacement is that only the updated part is replaced instead of page reloading.
iframe Mode
No additional configuration is required to use this mode, you only need to access it in the following URL format
http://«host»:«port»/webpack-dev-server/« path»
For example: http://localhost:8080/webpack-dev-server/index.html.
inline mode
inline mode The URL we visit does not need to change. There are two situations when enabling this mode:
1 When starting webpack-dev-server from the command line, two things need to be done:
Add the --inline command to the command line
Add devServer:{inline:true} to webpack.config.js
2 When starting webpack-dev-server with Node.js API, we also need to do two things:
Since there is no inline option in the configuration of webpack-dev-server, we You need to add webpack-dev-server/client?http://«path»:«port»/ to the entry entry point of the webpack configuration.
Change Add to the html file
var config = require("./webpack.config.js");
var webpack = require('webpack');
var WebpackDevServer = require('webpack-dev-server');
config.entry.app.unshift("webpack-dev-server/client?http://localhost:8080/");
var compiler = webpack(config);
var server = new WebpackDevServer(compiler, {
contentBase:'build/',
publicPath: "/assets/"
});
server.listen(8080);Run the above code in Node .
Note: The devSever configuration item in the webpack configuration is only valid in command line mode.
(Hot Module Replacement) Hot module replacement
Run inline mode in the command line and enable hot module replacement
Just add more here The --hot command is OK. As shown below.
webpack-dev-server --content-base build --inline --hot
Note: In command line mode, output.publicPath must be configured in webpack.config.js to specify the access location of the compiled package (bundle) .
Run inline mode in Nodejs API and enable hot module replacement
You need to do the following three things here:
In webpack.config. Add to the entry option of js: webpack/hot/dev-server
Add to the plugins option of webpack.config.js: new webpack.HotModuleReplacementPlugin()
Add in the configuration of webpack-dev-server: hot:true
Configuration options in webpack-dev-server
var WebpackDevServer = require("webpack-dev-server");
var webpack = require("webpack");
var compiler = webpack({
// configuration
});
var server = new WebpackDevServer(compiler, {
// webpack-dev-server options
contentBase: "/path/to/directory",
// Can also be an array, or: contentBase: "http://localhost/",
hot: true,
// Enable special support for Hot Module Replacement
// Page is no longer updated, but a "webpackHotUpdate" message is send to the content
// Use "webpack/hot/dev-server" as additional module in your entry point
// Note: this does _not_ add the `HotModuleReplacementPlugin` like the CLI option does.
// Set this as true if you want to access dev server from arbitrary url.
// This is handy if you are using a html5 router.
historyApiFallback: false,
// Set this if you want to enable gzip compression for assets
compress: true,
// Set this if you want webpack-dev-server to delegate a single path to an arbitrary server.
// Use "**" to proxy all paths to the specified server.
// This is useful if you want to get rid of 'http://localhost:8080/' in script[src],
// and has many other use cases (see https://github.com/webpack/webpack-dev-server/pull/127 ).
proxy: {
"**": "http://localhost:9090"
},
setup: function(app) {
// Here you can access the Express app object and add your own custom middleware to it.
// For example, to define custom handlers for some paths:
// app.get('/some/path', function(req, res) {
// res.json({ custom: 'response' });
// });
},
// pass [static options](http://expressjs.com/en/4x/api.html#express.static) to inner express server
staticOptions: {
},
// webpack-dev-middleware options
quiet: false,
noInfo: false,
lazy: true,
filename: "bundle.js",
watchOptions: {
aggregateTimeout: 300,
poll: 1000
},
// It's a required option.
publicPath: "/assets/",
headers: { "X-Custom-Header": "yes" },
stats: { colors: true }
});
server.listen(8080, "localhost", function() {});
// server.close();Believe it or not After reading the case in this article, you have mastered the method. For more exciting information, please pay attention to other related articles on the PHP Chinese website!
Recommended reading:
H5 canvas chart implements histogram
How should the Vue project be packaged according to the environment
The above is the detailed content of Steps to use webpack-dev-server. For more information, please follow other related articles on the PHP Chinese website!
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
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1381
52
How to use magnet links
Feb 18, 2024 am 10:02 AM
Magnet link is a link method for downloading resources, which is more convenient and efficient than traditional download methods. Magnet links allow you to download resources in a peer-to-peer manner without relying on an intermediary server. This article will introduce how to use magnet links and what to pay attention to. 1. What is a magnet link? A magnet link is a download method based on the P2P (Peer-to-Peer) protocol. Through magnet links, users can directly connect to the publisher of the resource to complete resource sharing and downloading. Compared with traditional downloading methods, magnetic
How to use mdf and mds files
Feb 19, 2024 pm 05:36 PM
How to use mdf files and mds files With the continuous advancement of computer technology, we can store and share data in a variety of ways. In the field of digital media, we often encounter some special file formats. In this article, we will discuss a common file format - mdf and mds files, and introduce how to use them. First, we need to understand the meaning of mdf files and mds files. mdf is the extension of the CD/DVD image file, and the mds file is the metadata file of the mdf file.
What software is crystaldiskmark? -How to use crystaldiskmark?
Mar 18, 2024 pm 02:58 PM
CrystalDiskMark is a small HDD benchmark tool for hard drives that quickly measures sequential and random read/write speeds. Next, let the editor introduce CrystalDiskMark to you and how to use crystaldiskmark~ 1. Introduction to CrystalDiskMark CrystalDiskMark is a widely used disk performance testing tool used to evaluate the read and write speed and performance of mechanical hard drives and solid-state drives (SSD). Random I/O performance. It is a free Windows application and provides a user-friendly interface and various test modes to evaluate different aspects of hard drive performance and is widely used in hardware reviews
How to download foobar2000? -How to use foobar2000
Mar 18, 2024 am 10:58 AM
foobar2000 is a software that can listen to music resources at any time. It brings you all kinds of music with lossless sound quality. The enhanced version of the music player allows you to get a more comprehensive and comfortable music experience. Its design concept is to play the advanced audio on the computer The device is transplanted to mobile phones to provide a more convenient and efficient music playback experience. The interface design is simple, clear and easy to use. It adopts a minimalist design style without too many decorations and cumbersome operations to get started quickly. It also supports a variety of skins and Theme, personalize settings according to your own preferences, and create an exclusive music player that supports the playback of multiple audio formats. It also supports the audio gain function to adjust the volume according to your own hearing conditions to avoid hearing damage caused by excessive volume. Next, let me help you
How to use NetEase Mailbox Master
Mar 27, 2024 pm 05:32 PM
NetEase Mailbox, as an email address widely used by Chinese netizens, has always won the trust of users with its stable and efficient services. NetEase Mailbox Master is an email software specially created for mobile phone users. It greatly simplifies the process of sending and receiving emails and makes our email processing more convenient. So how to use NetEase Mailbox Master, and what specific functions it has. Below, the editor of this site will give you a detailed introduction, hoping to help you! First, you can search and download the NetEase Mailbox Master app in the mobile app store. Search for "NetEase Mailbox Master" in App Store or Baidu Mobile Assistant, and then follow the prompts to install it. After the download and installation is completed, we open the NetEase email account and log in. The login interface is as shown below
How to use Baidu Netdisk app
Mar 27, 2024 pm 06:46 PM
Cloud storage has become an indispensable part of our daily life and work nowadays. As one of the leading cloud storage services in China, Baidu Netdisk has won the favor of a large number of users with its powerful storage functions, efficient transmission speed and convenient operation experience. And whether you want to back up important files, share information, watch videos online, or listen to music, Baidu Cloud Disk can meet your needs. However, many users may not understand the specific use method of Baidu Netdisk app, so this tutorial will introduce in detail how to use Baidu Netdisk app. Users who are still confused can follow this article to learn more. ! How to use Baidu Cloud Network Disk: 1. Installation First, when downloading and installing Baidu Cloud software, please select the custom installation option.
BTCC tutorial: How to bind and use MetaMask wallet on BTCC exchange?
Apr 26, 2024 am 09:40 AM
MetaMask (also called Little Fox Wallet in Chinese) is a free and well-received encryption wallet software. Currently, BTCC supports binding to the MetaMask wallet. After binding, you can use the MetaMask wallet to quickly log in, store value, buy coins, etc., and you can also get 20 USDT trial bonus for the first time binding. In the BTCCMetaMask wallet tutorial, we will introduce in detail how to register and use MetaMask, and how to bind and use the Little Fox wallet in BTCC. What is MetaMask wallet? With over 30 million users, MetaMask Little Fox Wallet is one of the most popular cryptocurrency wallets today. It is free to use and can be installed on the network as an extension
How to use Xiaoai Speaker How to connect Xiaoai Speaker to mobile phone
Feb 22, 2024 pm 05:19 PM
After long pressing the play button of the speaker, connect to wifi in the software and you can use it. Tutorial Applicable Model: Xiaomi 12 System: EMUI11.0 Version: Xiaoai Classmate 2.4.21 Analysis 1 First find the play button of the speaker, and press and hold to enter the network distribution mode. 2 Log in to your Xiaomi account in the Xiaoai Speaker software on your phone and click to add a new Xiaoai Speaker. 3. After entering the name and password of the wifi, you can call Xiao Ai to use it. Supplement: What functions does Xiaoai Speaker have? 1 Xiaoai Speaker has system functions, social functions, entertainment functions, knowledge functions, life functions, smart home, and training plans. Summary/Notes: The Xiao Ai App must be installed on your mobile phone in advance for easy connection and use.
