How to use CommonsChunkPlugin to extract public modules
Now I will share with you a brief talk about CommonsChunkPlugin extracting public modules. It has great reference value and I hope it will be helpful to everyone.
Introduction
The main function of the webpack plug-in CommonsChunkPlugin is to extract the common part of the webpack project entry chunk. The specific usage will not be introduced too much. If you don’t know much about it, you can refer to webpack official website for introduction;
This plug-in is a commonly used optimization function in webpack projects and is used in almost every webpack project. Benefits of using this plug-in:
Improve webpack packaging speed and project size: Extract all common codes in the chunk file of webpack entry to reduce code size; at the same time, improve webpack packaging speed.
Utilize the caching mechanism: The dependent public module files generally rarely change or will not change, so that the independent module files can be cached for a long time.
But in the project, if the plug-in opening method is incorrect, the second point above is actually impossible to achieve, because in this case:
There is no modified public code or library The Entry Chunk packaged by the code will change with changes in other business codes, causing the long cache mechanism on the page to fail.
So, let’s open the CommonsChunkPlugin correctly.
Incorrect usage of CommonsChunkPlugin
If we isolate the public libraries of our project such as react, react-dom, and react-router from the business code, Extract it as a vendor chunk, and the webpack configuration is as follows:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 |
|
Above, some basic libraries of the project are packaged into a chunk named vendor, and business-related code is packaged into a chunk named app;
The results after webpack packaging and compilation are as follows:
After we modify the business code app.js, the recompilation results are as follows:
It can be found that under the configuration of CommonsChunkPlugin, when the business code app changes, the library code also changes, and the vendor's chunkhash also changes, so that the name of the vendor's reference follows. Changes lead to the failure of the long cache mechanism on the browser side.
The cause of the problem
The reason why the vendor changes every time webpack is packaged and compiled:
Every time webpack is packaged and compiled Some runtime code will be generated during build. When there is only one file, the runtime code is directly inserted into this file. When there are multiple files, the runtime code will be extracted into the common file, which is the vendor chunk configured by CommonsChunkPlugin above.
The runtime code generated each time webpack is compiled, including the definition of the global webpackJsonp method and the maintenance of module dependencies. For details, please refer to commons.js here.
So, in the CommonsChunkPlugin configuration of webpack above, these codes will be packaged into the vendor every time it is compiled, causing the vendor's chunkhash to change every time.
Then, we can configure the vendor chunk and extract the public code, that is, the webpack runtime code, so that the basic library modules that the project depends on can be isolated from the business modules, because there will be no These files are modified so these files can serve as long caches. The specific configuration is as follows:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
|
In this way, even if the business app code is modified, the basic library vendor chunk that the project depends on will not change; only the extracted manifest chunk will change every time, but the file size is very small. This method has greater benefits than vendor. As shown below:
The packaging and compilation results after modifying the app code are as follows. You can see that the vendor’s chunkhash has not changed
One thing to note when configuring CommonsChunkPlugin in webpack:
When configuring the output item of webpack, its filename and chunkFilename must use chunkhash. Do not use hash, otherwise even according to the above configuration, the expected results will not be achieved. As for the difference between hash and chunkhash, you can refer to github's answer
. The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.
Related articles:
Check in jQuery SpringMVC Box selection and value passing example_jquery
How to get the value of the multi-select box value in post in SpringMVC (code example)
Use Vue How to set multiple Class
The above is the detailed content of How to use CommonsChunkPlugin to extract public modules. 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

Detailed explanation of JavaScript string replacement method and FAQ This article will explore two ways to replace string characters in JavaScript: internal JavaScript code and internal HTML for web pages. Replace string inside JavaScript code The most direct way is to use the replace() method: str = str.replace("find","replace"); This method replaces only the first match. To replace all matches, use a regular expression and add the global flag g: str = str.replace(/fi

Simple JavaScript functions are used to check if a date is valid. function isValidDate(s) { var bits = s.split('/'); var d = new Date(bits[2] '/' bits[1] '/' bits[0]); return !!(d && (d.getMonth() 1) == bits[1] && d.getDate() == Number(bits[0])); } //test var

This article discusses how to use jQuery to obtain and set the inner margin and margin values of DOM elements, especially the specific locations of the outer margin and inner margins of the element. While it is possible to set the inner and outer margins of an element using CSS, getting accurate values can be tricky. // set up $("div.header").css("margin","10px"); $("div.header").css("padding","10px"); You might think this code is

This article explores ten exceptional jQuery tabs and accordions. The key difference between tabs and accordions lies in how their content panels are displayed and hidden. Let's delve into these ten examples. Related articles: 10 jQuery Tab Plugins

Discover ten exceptional jQuery plugins to elevate your website's dynamism and visual appeal! This curated collection offers diverse functionalities, from image animation to interactive galleries. Let's explore these powerful tools: Related Posts: 1

http-console is a Node module that gives you a command-line interface for executing HTTP commands. It’s great for debugging and seeing exactly what is going on with your HTTP requests, regardless of whether they’re made against a web server, web serv

This tutorial shows you how to integrate a custom Google Search API into your blog or website, offering a more refined search experience than standard WordPress theme search functions. It's surprisingly easy! You'll be able to restrict searches to y

The following jQuery code snippet can be used to add scrollbars when the div content exceeds the container element area. (No demonstration, please copy it directly to Firebug) //D = document //W = window //$ = jQuery var contentArea = $(this), wintop = contentArea.scrollTop(), docheight = $(D).height(), winheight = $(W).height(), divheight = $('#c
