Solution: 1. Click "File" - "Preferences" - "Languages & Frameworks" - "JavaScript" on the navigation bar, and set the version to "ECMAScript 6". 2. Execute the "npm install -g babel" command to install the Babel tool, open "File watchers" and click the " " button to configure Babel in the pop-up window.

The operating environment of this tutorial: Windows 7 system, ECMAScript version 6, Dell G3 computer.
ECMAScript 6 is the next generation standard for the JavaScript language and was officially released in June 2015. Mozilla will launch JavaScript 2.0 based on this standard.
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.
I also wanted to try out the new features of ES6, so I started learning.
I wrote this code in webstorm to experience the convenience of ES6 syntax, but a lot of errors were reported

Various syntax errors
Solution
1. Grammar support settings
File > Preferences > Languages & Frameworks > JavaScript
Just configure the ECMAScript version here

After configuration

2. Automatically transcode to ES5
file watcher + babel(ES6转码器)
You may want you The code written has better compatibility, but the current ES6 is certainly not supported by all browsers, so we need to use the ES6 transcoder.
Babel is a widely used ES6 transcoder that can convert ES6 code into ES5 code for execution in browsers or other environments. This means that you can write programs in ES6 without worrying about whether the existing environment supports it.
And you also want to automatically transcode every time you modify the code, so you also need to use webstorm's file watcher (of course there are other solutions)
npm install -g babel- ##Preferences > Tools > File watchers
- Click the " " button
file watcher configuration interface
File Type: Configure the file type that the listener monitors, which can be found in Preferences > Editor > File types ConfigurationScope: Configure the listening scope of the listener. You can customize a new scope or use the scope defined in Preferences > Appearance & Behavior > ScopesProgram: babel Installation locationArguments: Command execution parameters, seeWorking directory: The location where the babel command is executed, the default is the directory where the file is locatedModifying the file in this way will generate files compiled into ES5 and sourceMap files at any time
After compilation
javascript video tutorial、Programming video、webstorm tutorial】
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