Checker#

Validates strings against regex patterns or registered rules with method chaining support.

Usage Scenarios#

• Form Validation: Validate user input in forms against specific patterns
• Data Sanitization: Ensure data meets expected formats before processing
• Conditional Logic: Chain multiple validation rules with .not() negation

Examples#

import { regex } from 'funtool';

// Basic validation
const isValidEmail = regex.checker('test@example.com').use(/^\S+@\S+\.\S+$/).isValid();

// Using registered rules
const isValidPassword = regex.checker('test@example.com').use('email').isValid();

Signature#

class Checker {
  constructor(input: string);
  use(rule: RuleName | RegExp): this;
  not(): this;
  isValid(): boolean;
}

Methods#

use(rule: RuleName | RegExp): this#

• rule: Registered rule name or RegExp pattern
• Returns: Checker instance for chaining
• Throws: Error if rule name is not registered

not(): this#

• Returns: Checker instance with next validation negated

isValid(): boolean#

• Returns: true if validation passed, false otherwise