53 lines
1.3 KiB
Plaintext
53 lines
1.3 KiB
Plaintext
---
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description: 'Enforce `RegExp#exec` over `String#match` if no global flag is provided.'
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---
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import Tabs from '@theme/Tabs';
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import TabItem from '@theme/TabItem';
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> 🛑 This file is source code, not the primary documentation location! 🛑
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>
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> See **https://typescript-eslint.io/rules/prefer-regexp-exec** for documentation.
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`String#match` is defined to work the same as `RegExp#exec` when the regular expression does not include the `g` flag.
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Keeping to consistently using one of the two can help improve code readability.
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This rule reports when a `String#match` call can be replaced with an equivalent `RegExp#exec`.
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> `RegExp#exec` may also be slightly faster than `String#match`; this is the reason to choose it as the preferred usage.
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## Examples
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<Tabs>
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<TabItem value="❌ Incorrect">
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```ts
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'something'.match(/thing/);
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'some things are just things'.match(/thing/);
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const text = 'something';
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const search = /thing/;
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text.match(search);
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```
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</TabItem>
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<TabItem value="✅ Correct">
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```ts
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/thing/.exec('something');
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'some things are just things'.match(/thing/g);
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const text = 'something';
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const search = /thing/;
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search.exec(text);
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```
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</TabItem>
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</Tabs>
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## When Not To Use It
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If you prefer consistent use of `String#match` for both with `g` flag and without it, you can turn this rule off.
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