Suggest using the rest parameters instead of arguments (prefer-rest-params)

建议使用剩余参数代替 arguments (prefer-rest-params)

There are rest parameters in ES2015. We can use that feature for variadic functions instead of the arguments variable.

ES2015 里有剩余参数。我们可以利用这个特性代替变参函数的 arguments 变量。

arguments does not have methods of Array.prototype, so it’s a bit of an inconvenience.

arguments 没有 Array.prototype 方法，所以有点不方便。

Rule Details

This rule is aimed to flag usage of arguments variables.

该规则旨在减少 arguments 变量的使用。

Examples

Examples of incorrect code for this rule:

错误 的代码示例：

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:

正确 的代码示例：

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

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

// Note: the implicit arguments can be overwritten.
function foo(arguments) {
    console.log(arguments); // This is the first argument.
}
function foo() {
    var arguments = 0;
    console.log(arguments); // This is a local variable.
}

When Not To Use It

This rule should not be used in ES3/5 environments.

该规则不应该在 ES3/5 环境中使用。

In ES2015 (ES6) or later, if you don’t want to be notified about arguments variables, then it’s safe to disable this rule.

在 ES2015 (ES6) 或更高的版本中，如果你不想收到关于 arguments 变量的通知，那么禁用此规则。

Version

This rule was introduced in ESLint 2.0.0-alpha-1.

该规则在 ESLint 2.0.0-alpha-1 中被引入。

Resources