noEmptyCharacterClassInRegex

JavaScript (and super languages)

摘要

¥Summary

规则生效日期：v1.3.0

¥Rule available since: v1.3.0
诊断类别：lint/correctness/noEmptyCharacterClassInRegex

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

¥This rule is recommended, which means is enabled by default.
此规则没有修复方案。

¥This rule doesn’t have a 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 no-empty-character-class 相同
  
  ¥Same as no-empty-character-class

如何配置

¥How to configure

1
{
2
  "linter": {
3
    "rules": {
4
      "correctness": {
5
        "noEmptyCharacterClassInRegex": "error"
6
      }
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    }
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  }
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}

描述

¥Description

禁止正则表达式文字中的空字符类。

¥Disallow empty character classes in regular expression literals.

空字符类不匹配任何内容。相比之下，否定的空类匹配任何字符。它们通常是打字错误的结果。

¥Empty character classes don’t match anything. In contrast, negated empty classes match any character. They are often the result of a typing mistake.

示例

¥Examples

无效

¥Invalid

1
/^a[]/.test("a"); // false

code-block.js:1:4 lint/correctness/noEmptyCharacterClassInRegex ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ The regular expression includes this empty character class.
  
  > 1 │ /^a[]/.test(“a”); // false
      │    ^^
    2 │ 
  
  ℹ Empty character classes don’t match anything.
    If you want to match against [, escape it \[.
    Otherwise, remove the character class or fill it.

1
/^a[^]/.test("ax"); // true

code-block.js:1:4 lint/correctness/noEmptyCharacterClassInRegex ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ✖ The regular expression includes this negated empty character class.
  
  > 1 │ /^a[^]/.test(“ax”); // true
      │    ^^^
    2 │ 
  
  ℹ Negated empty character classes match anything.
    If you want to match against [, escape it \[.
    Otherwise, remove the character class or fill it.

有效

¥Valid

1
/^a[xy]/.test("ay"); // true

1
/^a[^xy]/.test("ab"); // true

1
/^a\[]/.test("a[]"); // true

noEmptyCharacterClassInRegex

摘要

如何配置

描述

示例

无效

有效

相关链接