WebStorm ES6 syntax settings and introduction to babel usage
The following editor will bring you an article on WebStorm ES6 syntax support settings & babel usage and automatic compilation (detailed explanation). The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor to take a look.
1. Grammar support settings
2. Babel installation
1. Global installationnpm install -g babel-cli2. Current project, applicable to situations where different babel versions are used
npm install --save-dev babel-cli
3. Basic usage of Babel
# 转码结果输出到标准输出 babel example.js # 转码结果写入一个文件 # --out-file 或 -o 参数指定输出文件 babel example.js --out-file compiled.js # 或者 babel example.js -o compiled.js # 整个目录转码 # --out-dir 或 -d 参数指定输出目录 babel src --out-dir lib # 或者 babel src -d lib # -s 参数生成source map文件 babel src -d lib -s
4. Using babel in webstorm
0. Create a new test.js file , used as a test caseinput.map(item => item + 1);1. A file needs to be added to the project: package.json
{ "name": "application-name", "version": "0.0.1"}2 , In the current project, install babel
npm install --save-dev babel-cli3. Use the File Watcher function that comes with WebStormPreferences > Tools > File Watchers, click right Click the + sign on the side, select babel, and click OK. After the operation is completed, if you modify the JS code at this time, you will find that a test-compiled.js file is generated synchronously. After opening, you will find that the code is consistent with the test.js code. You also need to configure transcoding rules, continue reading below. ↓↓↓
#4. Add the configuration file
.babelrc<span style="color:#000000;font-family:NSimsun"></span>
Babel’s configuration file is
.babelrc<span style="font-family:NSimsun">, stored in the root directory of the project. The first step in using Babel is to configure this file. </span>
This file is used to set transcoding rules and plug-ins. The basic format is as follows.
{ "presets": [], "plugins": []}
5. Set the transcoding rules
presets<span style="font-family:NSimsun"> field to set the transcoding rules , the official provides the following rule sets, you can install them according to your needs. </span>
# ES2015转码规则 npm install --save-dev babel-preset-es2015 # react转码规则 npm install --save-dev babel-preset-react # ES7不同阶段语法提案的转码规则(共有4个阶段),选装一个 npm install --save-dev babel-preset-stage-0 npm install --save-dev babel-preset-stage-1 npm install --save-dev babel-preset-stage-2 npm install --save-dev babel-preset-stage-3
We need to install es2015, the command is as follows:
npm install --save-dev babel-preset-es2015
6. Update the configuration file.babelrc
Save the corresponding rules to the configuration file.
{ "presets": [ "es2015" ], "plugins": [] }
7. Complete, check the effect
After the above steps are completed, you can automatically convert the ES6 code to ES5 after modifying the code.
5. Use the command to manually compile the code1. Change the package.json file
{ "name": "application-name", "version": "0.0.1", "devDependencies": { "babel-cli": "^6.26.0" }, "scripts": { "build": "babel src -d lib" } }
2. Use the command to generate ES5 code
npm run build
3. The effect
will be The code in the directory is compiled into the lib directory.
The above is the detailed content of WebStorm ES6 syntax settings and introduction to babel usage. For more information, please follow other related articles on the PHP Chinese website!

Understanding how JavaScript engine works internally is important to developers because it helps write more efficient code and understand performance bottlenecks and optimization strategies. 1) The engine's workflow includes three stages: parsing, compiling and execution; 2) During the execution process, the engine will perform dynamic optimization, such as inline cache and hidden classes; 3) Best practices include avoiding global variables, optimizing loops, using const and lets, and avoiding excessive use of closures.

Python is more suitable for beginners, with a smooth learning curve and concise syntax; JavaScript is suitable for front-end development, with a steep learning curve and flexible syntax. 1. Python syntax is intuitive and suitable for data science and back-end development. 2. JavaScript is flexible and widely used in front-end and server-side programming.

Python and JavaScript have their own advantages and disadvantages in terms of community, libraries and resources. 1) The Python community is friendly and suitable for beginners, but the front-end development resources are not as rich as JavaScript. 2) Python is powerful in data science and machine learning libraries, while JavaScript is better in front-end development libraries and frameworks. 3) Both have rich learning resources, but Python is suitable for starting with official documents, while JavaScript is better with MDNWebDocs. The choice should be based on project needs and personal interests.

The shift from C/C to JavaScript requires adapting to dynamic typing, garbage collection and asynchronous programming. 1) C/C is a statically typed language that requires manual memory management, while JavaScript is dynamically typed and garbage collection is automatically processed. 2) C/C needs to be compiled into machine code, while JavaScript is an interpreted language. 3) JavaScript introduces concepts such as closures, prototype chains and Promise, which enhances flexibility and asynchronous programming capabilities.

Different JavaScript engines have different effects when parsing and executing JavaScript code, because the implementation principles and optimization strategies of each engine differ. 1. Lexical analysis: convert source code into lexical unit. 2. Grammar analysis: Generate an abstract syntax tree. 3. Optimization and compilation: Generate machine code through the JIT compiler. 4. Execute: Run the machine code. V8 engine optimizes through instant compilation and hidden class, SpiderMonkey uses a type inference system, resulting in different performance performance on the same code.

JavaScript's applications in the real world include server-side programming, mobile application development and Internet of Things control: 1. Server-side programming is realized through Node.js, suitable for high concurrent request processing. 2. Mobile application development is carried out through ReactNative and supports cross-platform deployment. 3. Used for IoT device control through Johnny-Five library, suitable for hardware interaction.

I built a functional multi-tenant SaaS application (an EdTech app) with your everyday tech tool and you can do the same. First, what’s a multi-tenant SaaS application? Multi-tenant SaaS applications let you serve multiple customers from a sing

This article demonstrates frontend integration with a backend secured by Permit, building a functional EdTech SaaS application using Next.js. The frontend fetches user permissions to control UI visibility and ensures API requests adhere to role-base


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

SublimeText3 English version
Recommended: Win version, supports code prompts!

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

VSCode Windows 64-bit Download
A free and powerful IDE editor launched by Microsoft

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function