eslint/prefer-rest-params Style

What it does

Disallows the use of the arguments object and instead enforces the use of rest parameters.

Why is this bad?

The arguments object does not have methods from Array.prototype, making it inconvenient for array-like operations. Using rest parameters provides a more intuitive and efficient way to handle variadic arguments.

Examples

Examples of incorrect code for this rule:

function foo() {
  console.log(arguments);
}

function foo(action) {
  var args = Array.prototype.slice.call(arguments, 1);
  action.apply(null, args);
}

function foo(action) {
  var args = [].slice.call(arguments, 1);
  action.apply(null, args);
}

Examples of correct code for this rule:

function foo(...args) {
  console.log(args);
}

function foo(action, ...args) {
  action.apply(null, args); // Or use `action(...args)` (related to `prefer-spread` rule).
}

// Note: Implicit `arguments` can be shadowed.
function foo(arguments) {
  console.log(arguments); // This refers to the first argument.
}
function foo() {
  var arguments = 0;
  console.log(arguments); // This is a local variable.
}

How to use

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

CLI

oxlint --deny prefer-rest-params

Config (.oxlintrc.json)

{
  "rules": {
    "prefer-rest-params": "error"
  }
}

References

• Rule Source