disallow deleting variables (no-delete-var)

禁止删除变量 (no-delete-var)

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。

The purpose of the delete operator is to remove a property from an object. Using the delete operator on a variable might lead to unexpected behavior.

delete 的目的是删除对象的属性。使用 delete 操作删除一个变量可能会导致意外情况发生。

Rule Details

This rule disallows the use of the delete operator on variables.

该规则禁止对变量使用 delete 操作符。

If ESLint parses code in strict mode, the parser (instead of this rule) reports the error.

如果 ESLint 是在严格模式下解析代码，解析器（而不是该规则）会报告错误。

Examples of incorrect code for this rule:

错误 代码示例：

/*eslint no-delete-var: "error"*/

var x;
delete x;

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