useRegexpExec

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JavaScript (and super languages)

Summary

Diagnostic Category: lint/nursery/useRegexpExec
This rule doesn’t have a fix.
The default severity of this rule is information.
This rule belongs to the following domains:
- project
Sources:
- Same as @typescript-eslint/prefer-regexp-exec
- Same as regexp/prefer-regexp-exec

How to configure

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{
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  "linter": {
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    "rules": {
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      "nursery": {
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        "useRegexpExec": "error"
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      }
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    }
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  }
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}

Description

Enforce RegExp#exec over String#match if no global flag is provided.

String#match is defined to work the same as RegExp#exec when the regular expression does not include the g flag. Keeping to consistently using one of the two can help improve code readability.

RegExp#exec may also be slightly faster than String#match; this is the reason to choose it as the preferred usage.

Examples

Invalid

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'something'.match(/thing/);

/invalid.ts:1:1 lint/nursery/useRegexpExec ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ Prefer RegExp#exec() over String#match() when searching within a string.
  
  > 1 │ ‘something’.match(/thing/);
      │ ^^^^^^^^^^^^^^^^^^^^^^^^^^
    2 │ 
  
  ℹ Use RegExp#exec() instead of String#match() for consistent and slightly faster regex matching.

Valid

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/thing/.exec('something');