Email Guards

Foundation

Validation and sanitization utilities for email templates. Enforces safe hex colors, validates URLs (blocks javascript: and data:), normalizes recipient addresses, and clamps subject lines to SMTP-safe lengths.

core/email-guards

Installation

1 · Add registry to components.json

2 · Install component

API Reference

Prop	Type	Default	Description
`sanitizeEmailTemplateHex(input, fallback)`	`string → string`	—	Only allows #rgb or #rrggbb, returns fallback otherwise.
`normalizeRecipientEmail(email, context)`	`string → string`	—	Trims and validates a recipient address.
`requireHttpOrHttpsUrl(raw, label)`	`string → string`	—	Blocks non-http(s) protocols.
`optionalHttpOrHttpsUrl(raw, label)`	`string \| undefined`	—	Like requireHttpOrHttpsUrl but accepts undefined/null.
`clampEmailSubjectLine(subject, maxLen?)`	`string → string`	—	Truncates to 200 chars with ellipsis.