Disallow modifying variables of class declarations (no-class-assign)

不允许修改类声明的变量 (no-class-assign)

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。

ClassDeclaration creates a variable, and we can modify the variable.

ClassDeclaration 创建一个变量，我们可以修改这个变量。

/*eslint-env es6*/

class A { }
A = 0;

But the modification is a mistake in most cases.

但是在大多数情况下，这样的修改是个错误。

Rule Details

This rule is aimed to flag modifying variables of class declarations.

该规则旨在标记类声明中变量的修改情况。

Examples of incorrect code for this rule:

错误 代码示例：

/*eslint no-class-assign: "error"*/
/*eslint-env es6*/

class A { }
A = 0;

/*eslint no-class-assign: "error"*/
/*eslint-env es6*/

A = 0;
class A { }

/*eslint no-class-assign: "error"*/
/*eslint-env es6*/

class A {
    b() {
        A = 0;
    }
}

/*eslint no-class-assign: "error"*/
/*eslint-env es6*/

let A = class A {
    b() {
        A = 0;
        // `let A` is shadowed by the class name.
    }
}

Examples of correct code for this rule:

正确 代码示例：

/*eslint no-class-assign: "error"*/
/*eslint-env es6*/

let A = class A { }
A = 0; // A is a variable.

/*eslint no-class-assign: "error"*/
/*eslint-env es6*/

let A = class {
    b() {
        A = 0; // A is a variable.
    }
}

/*eslint no-class-assign: 2*/
/*eslint-env es6*/

class A {
    b(A) {
        A = 0; // A is a parameter.
    }
}

When Not To Use It

If you don’t want to be notified about modifying variables of class declarations, you can safely disable this rule.

如果你不想收到类声明中变量的修改的通知，你可以禁用此规则。

Version

This rule was introduced in ESLint 1.0.0-rc-1.

该规则在 ESLint 1.0.0-rc-1 中被引入。

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