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:
javascript
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:
javascript
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.
}