51 lines
1.2 KiB
TypeScript
51 lines
1.2 KiB
TypeScript
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/**
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* Validates email format (basic RFC 5322 pattern)
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* @param email - Email address to validate
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* @returns true if valid email format
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*/
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export function isValidEmail(email: string): boolean {
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const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/
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return emailRegex.test(email)
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}
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/**
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* Validates URL format
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* @param url - URL to validate
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* @returns true if valid URL format
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*/
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export function isValidUrl(url: string): boolean {
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try {
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new URL(url)
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return true
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} catch {
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return false
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}
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}
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/**
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* Checks if string is empty or only whitespace
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* @param text - Text to check
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* @returns true if empty or whitespace-only
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*/
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export function isEmpty(text: string): boolean {
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return text.trim().length === 0
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}
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/**
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* Checks if string contains only alphanumeric characters
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* @param text - Text to check
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* @returns true if alphanumeric only
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*/
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export function isAlphanumeric(text: string): boolean {
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return /^[a-zA-Z0-9]+$/.test(text)
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}
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/**
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* Validates username format (alphanumeric, underscores, hyphens, 3-30 chars)
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* @param username - Username to validate
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* @returns true if valid username format
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*/
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export function isValidUsername(username: string): boolean {
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return /^[a-zA-Z0-9_-]{3,30}$/.test(username)
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}
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