useValidTypeof

JavaScript (and super languages)

摘要

¥Summary

规则生效日期：v1.0.0

¥Rule available since: v1.0.0
诊断类别：lint/correctness/useValidTypeof

¥Diagnostic Category: lint/correctness/useValidTypeof
此规则为推荐规则，默认启用。

¥This rule is recommended, which means is enabled by default.
此规则包含 unsafe 修复程序。

¥This rule has an unsafe fix.
此规则的默认严重级别为 error。

¥The default severity of this rule is error.
来源：

¥Sources:
- 与 valid-typeof 相同
  
  ¥Same as valid-typeof

如何配置

¥How to configure

1
{
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  "linter": {
3
    "rules": {
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      "correctness": {
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        "useValidTypeof": "error"
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      }
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    }
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  }
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}

描述

¥Description

此规则检查 typeof 表达式的结果是否与有效值进行比较。

¥This rule checks that the result of a typeof expression is compared to a valid value.

示例

¥Examples

无效

¥Invalid

1
typeof foo === "strnig";

code-block.js:1:16 lint/correctness/useValidTypeof ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ “strnig” is not a valid typeof value.
  
  > 1 │ typeof foo === “strnig”;
      │                ^^^^^^^^
    2 │

1
typeof foo == "undefimed";

code-block.js:1:15 lint/correctness/useValidTypeof ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ “undefimed” is not a valid typeof value.
  
  > 1 │ typeof foo == “undefimed”;
      │               ^^^^^^^^^^^
    2 │

1
typeof bar != "nunber";

code-block.js:1:15 lint/correctness/useValidTypeof ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ “nunber” is not a valid typeof value.
  
  > 1 │ typeof bar != “nunber”;
      │               ^^^^^^^^
    2 │

1
typeof foo === undefined;

code-block.js:1:16 lint/correctness/useValidTypeof ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Invalid typeof comparison.
  
  > 1 │ typeof foo === undefined;
      │                ^^^^^^^^^
    2 │ 
  
  ℹ Compare with one of the following string literals:
  
  - “bigint”
  - “boolean”
  - “function”
  - “number”
  - “object”
  - “string”
  - “symbol”
  - “undefined”

1
typeof foo == 0;

code-block.js:1:15 lint/correctness/useValidTypeof ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ Invalid typeof comparison.
  
  > 1 │ typeof foo == 0;
      │               ^
    2 │ 
  
  ℹ Compare with one of the following string literals:
  
  - “bigint”
  - “boolean”
  - “function”
  - “number”
  - “object”
  - “string”
  - “symbol”
  - “undefined”

有效

¥Valid

1
typeof foo === "string";

1
typeof bar == "undefined";

1
typeof bar === typeof qux;

1
typeof foo === bar

useValidTypeof

摘要

如何配置

描述

示例

无效

有效

相关链接