How to enable autocomplete for Google Apps Script in locally-installed IDE

I found the solution that partially works, but it may not be applicable to other software. The steps below are for Visual Studio Code:

Install the NPM package containing type definitions for GAS using
```
https://www.npmjs.com/package/@types/google-apps-script
```
In your locally-saved script, create a '.js' file and type
```
import 'google-apps-script';
```

This answer is a minor variation on the accepted one for IDEs/extensions which support Typescript auto completion based on tsc/tsserver:

Install TypeScript and @types/google-apps-script
- https://www.npmjs.com/package/typescript
- https://www.npmjs.com/package/@types/google-apps-script

Create a jsconfig.json file in your local project directory:

{ 
    "compilerOptions": {
        "checkJs": true
      }
}

Alternatively, If you're using typescript along with javascript, then create a tsconfig.json:

{ 
    "compilerOptions": {
        "allowJs": true,
        "checkJs": true,
        "types": ["google-apps-script"]
      }
}

Include both filenames in .claspignore, if you're using clasp and if the file is in your local directory.
You can also use any of this config globally, if the config is in your home/parent directory, as tsc searches for this config from project/local folder to root(in which case, you don't need to include it in .claspignore).

If you are using any JetBrains IDE:

Go to Languages & Frameworks -> JavaScript -> Libraries -> Download... and download the library google-apps-script.

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Try including the file name, import.js in .claspignore (docs).

This should save some trouble deleting the file before each push every time.

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