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noUselessEscapeInRegex

¥Summary

¥How to configure

biome.json
{
"linter": {
"rules": {
"complexity": {
"noUselessEscapeInRegex": "error"
}
}
}
}

¥Description

禁止在正则表达式文字中使用不必要的转义序列。

¥Disallow unnecessary escape sequence in regular expression literals.

在正则表达式文字中转义非特殊字符没有任何效果。因此,它们可能会让读者感到困惑。

¥Escaping non-special characters in regular expression literals doesn’t have any effect. Hence, they may confuse a reader.

¥Examples

¥Invalid

/\a/;
code-block.js:1:2 lint/complexity/noUselessEscapeInRegex  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

ℹ The character doesn’t need to be escaped.

> 1 │ /\a/;
│ ^^
2 │

ℹ Safe fix: Unescape the character.

1 │ /\a/;
│ -
/[\-]/;
code-block.js:1:3 lint/complexity/noUselessEscapeInRegex  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

ℹ The character doesn’t need to be escaped.

> 1 │ /[\-]/;
│ ^^
2 │

ℹ The character should only be escaped if it appears in the middle of the character class or under the `v` flag.

ℹ Safe fix: Unescape the character.

1 │ /[\-]/;
│ -
/[\&]/v;
code-block.js:1:3 lint/complexity/noUselessEscapeInRegex  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

ℹ The character doesn’t need to be escaped.

> 1 │ /[\&]/v;
│ ^^
2 │

ℹ Safe fix: Unescape the character.

1 │ /[\&]/v;
│ -

¥Valid

/\^\d\b/
/[\b]/

¥Related links