no-delete-var

NOTE: this rule is part of the 推荐 rule set.

Enable full set in deno.json:

{
  "lint": {
    "rules": {
      "tags": ["推荐"]
    }
  }
}

Enable full set using the Deno CLI:

deno lint --rules-tags=推荐

This rule can be explictly included to or excluded from the rules present in the current tag by adding it to the include or exclude array in deno.json:

{
  "lint": {
    "rules": {
      "include": ["no-delete-var"],
      "exclude": ["no-delete-var"]
    }
  }
}

不允许删除变量。

delete 用于从对象中移除一个属性。通过 var、let 和 const 声明的变量无法被删除（delete 将返回 false）。在严格模式下，当试图删除一个变量时会抛出语法错误。

无效示例：

const a = 1;
let b = 2;
let c = 3;
delete a; // 将返回 false
delete b; // 将返回 false
delete c; // 将返回 false

有效示例：

let obj = {
  a: 1,
};
delete obj.a; // 返回 true

no-delete-var

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