Disallow duplicate name in class members (no-dupe-class-members)

不允许类成员中有重复的名称 (no-dupe-class-members)

The "extends": "eslint:recommended" property in a configuration file enables this rule.

配置文件中的 "extends": "eslint:recommended" 属性启用了此规则。

If there are declarations of the same name in class members, the last declaration overwrites other declarations silently. It can cause unexpected behaviors.

如果类成员中有同名的声明，最后一个声明将会默默地覆盖其它声明。它可能导致意外的行为。

/*eslint-env es6*/

class Foo {
  bar() { console.log("hello"); }
  bar() { console.log("goodbye"); }
}

var foo = new Foo();
foo.bar(); // goodbye

Rule Details

This rule is aimed to flag the use of duplicate names in class members.

该规则旨在标记类成员中重复名称的使用。

Examples

Examples of incorrect code for this rule:

错误代码示例：

/*eslint no-dupe-class-members: "error"*/
/*eslint-env es6*/

class Foo {
  bar() { }
  bar() { }
}

class Foo {
  bar() { }
  get bar() { }
}

class Foo {
  static bar() { }
  static bar() { }
}

Examples of correct code for this rule:

正确代码示例：

/*eslint no-dupe-class-members: "error"*/
/*eslint-env es6*/

class Foo {
  bar() { }
  qux() { }
}

class Foo {
  get bar() { }
  set bar(value) { }
}

class Foo {
  static bar() { }
  bar() { }
}

When Not To Use It

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

该规则不应在 ES3/5 环境下使用。

In ES2015 (ES6) or later, if you don’t want to be notified about duplicate names in class members, you can safely disable this rule.

在ES2015 (ES6)或之后的版本，如果你不想收到关于类成员中有重复名称的通知，你可以关闭此规则。

Version

This rule was introduced in ESLint 1.2.0.