Verify calls of super() in constructors (constructor-super)

验证构造函数中 super() 的调用 (constructor-super)

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。

Constructors of derived classes must call super(). Constructors of non derived classes must not call super(). If this is not observed, the JavaScript engine will raise a runtime error.

派生类中的构造函数必须调用 super()。非派生类的构造函数不能调用 super()JavaScript 引擎将引发一个运行时错误

This rule checks whether or not there is a valid super() call.

该规则检查是否有一个有效的 super() 调用。

Rule Details

This rule is aimed to flag invalid/missing super() calls.

该规则旨在标记无效或缺失的 super() 调用。

Examples of incorrect code for this rule:

错误 代码示例：

/*eslint constructor-super: "error"*/
/*eslint-env es6*/

class A {
    constructor() {
        super();  // This is a SyntaxError.
    }
}

class A extends B {
    constructor() { }  // Would throw a ReferenceError.
}

// Classes which inherits from a non constructor are always problems.
class A extends null {
    constructor() {
        super();  // Would throw a TypeError.
    }
}

class A extends null {
    constructor() { }  // Would throw a ReferenceError.
}

Examples of correct code for this rule:

正确 代码示例：

/*eslint constructor-super: "error"*/
/*eslint-env es6*/

class A {
    constructor() { }
}

class A extends B {
    constructor() {
        super();
    }
}

When Not To Use It

If you don’t want to be notified about invalid/missing super() callings in constructors, you can safely disable this rule.

如果你不想收到构造函数中无效或缺失的 super() 调用，你可以关闭此规则。

Version

This rule was introduced in ESLint 0.24.0.

该规则在 ESLint 0.24.0 中被引入。

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