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noUselessEscapeInRegex

诊断类别:lint/nursery/noUselessEscapeInRegex

¥Diagnostic Category: lint/nursery/noUselessEscapeInRegex

自从:v1.9.0

¥Since: v1.9.0

来源:

¥Sources:

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/nursery/noUselessEscapeInRegex  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

The character doesn’t need to be escaped.

> 1 │ /\a/;
^^
2 │

Safe fix: Unescape the character.

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

The character doesn’t need to be escaped.

> 1 │ /[\-]/;
^^
2 │

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

Safe fix: Unescape the character.

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

The character doesn’t need to be escaped.

> 1 │ /[\&]/v;
^^
2 │

Safe fix: Unescape the character.

1 │ /[\&]/v;
-

¥Valid

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

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