eslint/no-invalid-regexp Correctness

✅ This rule is turned on by default.

What it does

Disallow invalid regular expression strings in RegExp constructors.

Why is this bad?

An invalid pattern in a regular expression literal is a SyntaxError when the code is parsed, but an invalid string in RegExp constructors throws a SyntaxError only when the code is executed.

Examples

Examples of incorrect code for this rule:

RegExp("[");
RegExp(".", "z");
new RegExp("\\");

Examples of correct code for this rule:

RegExp(".");
new RegExp();
this.RegExp("[");

Configuration

This rule accepts a configuration object with the following properties:

allowConstructorFlags

type: string[]

default: []

Case-sensitive array of flags that will be allowed.

How to use

To enable this rule using the config file or in the CLI, you can use:

Config (.oxlintrc.json)Config (oxlint.config.ts)CLI

json

{
  "rules": {
    "no-invalid-regexp": "error"
  }
}

import { defineConfig } from "oxlint";

export default defineConfig({
  rules: {
    "no-invalid-regexp": "error",
  },
});

bash

oxlint --deny no-invalid-regexp

Version

This rule was added in v0.9.4.

What it does ​

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allowConstructorFlags ​

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