eslint/no-func-assign Correctness

✅ This rule is turned on by default.

Disallow reassigning function declarations.

This rule can be disabled for TypeScript code, as the TypeScript compiler enforces this check.

Overwriting/reassigning a function written as a FunctionDeclaration is often indicative of a mistake or issue.

Examples of incorrect code for this rule:

javascript

function foo() {}
foo = bar;

javascript

function foo() {
  foo = bar;
}

javascript

let a = function hello() {
  hello = 123;
};

Examples of correct code for this rule:

javascript

let foo = function () {};
foo = bar;

javascript

function baz(baz) {
  // `baz` is shadowed.
  baz = bar;
}

function qux() {
  const qux = bar;  // `qux` is shadowed.
}

How to use

To enable this rule using the config file or in the CLI, you can use:

Config (.oxlintrc.json)Config (oxlint.config.ts)CLI

json

{
  "rules": {
    "no-func-assign": "error"
  }
}

import { defineConfig } from "oxlint";

export default defineConfig({
  rules: {
    "no-func-assign": "error",
  },
});

bash

oxlint --deny no-func-assign

This rule was added in v0.0.3.