jaridmargolin/formatter.js

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

2446 stars · 227 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A dependency-free JavaScript library that formats user input in HTML fields to match a specified pattern (e.g., phone numbers, credit cards, zip codes) as the user types. It works with vanilla JavaScript and includes a jQuery wrapper, supporting dynamic pattern switching based on input content.

Use cases

• format phone number input as user types
• mask credit card input with dashes
• format zip or postal code input dynamically
• add input masking to a form without dependencies
• apply pattern-based formatting to text inputs in jQuery

When to choose

• you need lightweight, dependency-free input masking in the browser
• you want pattern-based formatting like phone numbers or credit cards
• you need dynamic patterns that switch based on input length or content

When to avoid

• you need masking outside the browser (e.g., Node.js or mobile-native)
• you require actively maintained software with a license file
• you need complex validation rather than simple pattern formatting

Facets

library · maturity maintenance

form-handling ui-components web-development frontend browser input-masking input-formatting vanilla-javascript jquery-plugin no-dependencies javascript

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