> For AI agents: the complete documentation index is available at https://rslint.rs/llms.txt, the full documentation bundle is available at https://rslint.rs/llms-full.txt.

# prefer-regex-literals

[Added in v0.6.5](https://github.com/web-infra-dev/rslint/releases/tag/v0.6.5)
## Configuration


```ts title=rslint.config.ts
import { defineConfig, js } from '@rslint/core';

export default defineConfig([
  js.configs.recommended,
  {
    rules: {
      'prefer-regex-literals': 'error',
    },
  },
]);
```

## Rule Details

This rule disallows `RegExp` constructor calls when the same regular expression
can be written as a literal.

Examples of **incorrect** code for this rule:

```javascript
new RegExp("abc");
RegExp("abc", "u");
new RegExp(String.raw`^\d\.$`);
```

Examples of **correct** code for this rule:

```javascript
/abc/;
/abc/u;

new RegExp(pattern);
RegExp("abc", flags);
new RegExp(prefix + "abc");
```

## Options

This rule accepts an options object with the following property:

- `disallowRedundantWrapping` (`boolean`, default `false`) — when `true`,
  additionally reports regex literals that are unnecessarily wrapped in a
  `RegExp` constructor.

To enable this option:

```json
{ "prefer-regex-literals": ["error", { "disallowRedundantWrapping": true }] }
```

Examples of **incorrect** code for this rule with
`{ "disallowRedundantWrapping": true }`:

```javascript
new RegExp(/abc/);
new RegExp(/abc/, "u");
```

Examples of **correct** code for this rule with
`{ "disallowRedundantWrapping": true }`:

```javascript
/abc/;
/abc/u;
new RegExp(/abc/, flags);
```

## Differences from ESLint

- rslint does not vary suggestions by configured ECMAScript version; a
  diagnostic is still reported when the pattern arguments are static.

## Original Documentation

- [ESLint: prefer-regex-literals](https://eslint.org/docs/latest/rules/prefer-regex-literals)
- [Source code](https://github.com/eslint/eslint/blob/v10.8.1/lib/rules/prefer-regex-literals.js)