# quick-lint-js

**Repository Path**: trusted-list/quick-lint-js

## Basic Information

- **Project Name**: quick-lint-js
- **Description**: quick-lint-js finds bugs in JavaScript programs
- **Primary Language**: Unknown
- **License**: GPL-3.0
- **Default Branch**: master
- **Homepage**: https://quick-lint-js.com
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2026-03-18
- **Last Updated**: 2026-03-26

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# <img src="dist/artwork/dusty-right.svg" alt="" title="Dusty, the quick-lint-js mascot" width="46.4" height="36" align="top"> quick-lint-js

quick-lint-js finds bugs in JavaScript programs.

quick-lint-js finds many bugs, including:

* Using a variable which does not exist
* Assigning to a `const` variable
* Using `await` in a non-`async` function
* Syntax errors

![Demonstration of quick-lint-js in Visual Studio Code](plugin/vscode/demo.webp)

## Installing

There are many ways to install quick-lint-js, depending on how you prefer to
work! Here are the environments we support:

- CLI (Command-Line Interface)
- LSP (Language Server Protocol)
- Editor Plugins for:
  - Visual Studio Code (VSCode)
  - VSCodium
  - Vim/Neovim
  - Sublime Text
  - Emacs
  - Kate

For detailed installation instructions, visit the [quick-lint-js installation
guide](https://quick-lint-js.com/install/).

## Examples

Here are some common bugs that quick-lint-js can catch:

### Example 1: Undefined Variable

```js
const occupation = "Engineer";
console.log("Welcome, " + ocupation); // Typo: 'ocupation' should be 'occupation'
```
Output: `use of undeclared variable: ocupation`

### Example 2: Reassigning a const variable

```js
const name = "John";
name = "Doe"; // Error: Cannot reassign a constant
```
Output: `assignment to const variable: name`

### Example 3: Using await in a non-async function

```js
function getData() {
  await fetch("/data");
}
```
Output: `await used in non-async function`

These are just a few examples of how quick-lint-js can help identify common
issues in your JavaScript code.

## Contributing

We’re always happy to welcome new contributors! If you’d like to contribute to
quick-lint-js, please refer to the contributing guide on our website for all the
details.

Check out the [contributing guide here](https://quick-lint-js.com/contribute/).

## Contact

If you have any questions or feedback, feel free to reach out:

- **Bugs and feature requests**: File an issue on GitHub.
- **IRC**: Ask questions in the [#quick-lint-js][quick-lint-js-irc-web] channel
  on Libera.Chat.
- **Security bug reports** (private disclosure): Email us at
  [strager.nds@gmail.com](mailto:strager.nds@gmail.com).

[quick-lint-js-irc-web]: https://kiwiirc.com/nextclient/irc.libera.chat/#quick-lint-js