# Regular Expression

A pattern for finding or checking text.

## What is **Regular Expression** in JavaScript?

**Regular Expression** — A pattern for finding or checking text.

```javascript
const orderPattern = /^ORD-\d{4}$/;
const valid = orderPattern.test("ORD-2048");
```

Level: Freelancer · [More JavaScript terms at this level](https://www.ask-codey.com/glossary/subjects/javascript/freelancer)

Updated: September 27, 2026

## In other subjects

- [Regular Expression in C#](https://www.ask-codey.com/glossary/regular-expression-c-sharp)
- [Regular Expression in Java](https://www.ask-codey.com/glossary/regular-expression-java)

Source: https://www.ask-codey.com/glossary/regular-expression-javascript