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quick-lint/quick-lint-js: quick-lint-js finds bugs in JavaScript programs

quick-lint-js

quick-lint-js finds bugs in JavaScript programs.

quick-lint-js finds many bugs, including:

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

For detailed installation instructions, visit the quick-lint-js installation guide.

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

Example 1: Undefined Variable
const occupation = "Engineer";
console.log("Welcome, " + ocupation); // Typo: 'ocupation' should be 'occupation'

Output: use of undeclared variable: ocupation

Example 2: Reassigning a const variable
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
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.

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.

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


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