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 in the CLI or using the config file, you can use:

CLI

oxlint --deny no-invalid-regexp

Config (.oxlintrc.json)

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

References

• Rule Source