Disallow Use of __proto__ (no-proto)

禁用__proto__（no-proto）

__proto__ property has been deprecated as of ECMAScript 3.1 and shouldn’t be used in the code. Use Object.getPrototypeOf and Object.setPrototypeOf instead.

__proto__ 属性在 ECMAScript 3.1 中已经被弃用，并且不应该在代码中使用。使用 Object.getPrototypeOf 和 Object.setPrototypeOf 代替。

Rule Details

When an object is created with the new operator, __proto__ is set to the original “prototype” property of the object’s constructor function. Object.getPrototypeOf is the preferred method of getting the object’s prototype. To change an object’s prototype, use Object.setPrototypeOf.

当使用 new 操作符创建对象时，将 __proto__ 设置为对象构造函数的原始 “prototype” 属性。Object.getPrototypeOf 是获取对象原型的首选方法。要更改对象的原型，请使用 Object.setPrototypeOf。

Examples of incorrect code for this rule:

错误 代码示例：

/*eslint no-proto: "error"*/

var a = obj.__proto__;

var a = obj["__proto__"];

obj.__proto__ = b;

obj["__proto__"] = b;

Examples of correct code for this rule:

正确 代码示例：

/*eslint no-proto: "error"*/

var a = Object.getPrototypeOf(obj);

Object.setPrototypeOf(obj, b);

var c = { __proto__: a };

When Not To Use It

If you need to support legacy browsers, you might want to turn this rule off, since support for getPrototypeOf is not yet universal.

You might want to turn this rule off if you need to support legacy browsers which implement the __proto__ property but not Object.getPrototypeOf or Object.setPrototypeOf.

如果需要支持实现 __proto__ 而不是 Object.getPrototypeOf 或 Object.setPrototypeOf 的遗留浏览器，则可能需要关闭此规则。

Further Reading

• Object.getPrototypeOf

Version

This rule was introduced in ESLint 0.0.9.

该规则在 ESLint 0.0.9 中被引入。

Resources

• Rule source
• Documentation source