How to use babel to convert ES6 to ES5 in Webstorm-JS Tutorial-php.cn

How to use babel to convert ES6 to ES5 in Webstorm

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Release： 2018-04-14 10:38:46

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This time I will show you how to use babel in Webstorm to convert ES6 to ES5, and how to use babel in Webstorm to convert ES6 to ES5. What are the precautions?The following is a practical case, let’s take a look take a look.

Foreword: ECMAScript 6 is the next generation standard of the JavaScript language, which was officially released in June 2015. Mozilla will launch JavaScript based on this standard 2.0. The goal of ES6 is to enable the JavaScript language to be used to write large and complex applications and become an enterprise-level development language. However, modern browsers do not have high support for the new features of ES6, so if you want to use the new features of ES6 directly in the browser, you must use other tools.

Today I will share how to configure Webstorm to use babel to automatically transcode ES6 to ES5. Babel is a widely used transcoder. Babel can perfectly convert ES6 code to ES5 code, so we can use ES6 features in our projects without waiting for browser support.

1. Create a new empty project in Webstorm and name it es6demo.

2. Then create a new package.json under the root directory, and only need to specify two attributes, namely name and version.

3. Open the webstorm terminal (Terminal), the shortcut key is Alt F12, Installbabel-cli. It can also be installed globally.

Install babel-cli: npm install --save-dev babel-cli

4. After installing babel-cli, you can see that a node_modules file and a package-lock.json file are newly generated. At the same time, it is found that there is an extra

"devDependencies": {
"babel-cli": "^6.26.0"
}

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# in the package.json file. ## Such a line of code indicates that babel-cli has been successfully installed and has become a dependency.

5. Then select the Javascript option in Settings->Languages & Frameworks, and select the version version as ECMAScript6.

6. In the webstorm terminal (Terminal), install Babel’s preset to correctly identify ES6 code. The command is as follows:

npm install --save-dev babel-preset-es2015

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After installation, there will be an additional

in the package.json file. "babel-preset-es2015": "^6.24.1" This line of code indicates that babel-preset-es2015 has also been successfully installed.

7. Create a new file named .babelrc under the root directory with the following content:

{
 "presets": [
  "es2015"
 ]
}

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8. Set up File Watcher. File--settings--Tools--File Watcher.

9. Create a file called test.js and write es6 syntax in it, so no errors will be reported. test-compiled.js is a file compiled into es5, and the default is strict mode.

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!