JavaScriptHow to validate a CPF with JavaScript
Learn how to validate a CPF with plain JavaScript, calculate the check digits, handle formatting and reject invalid sequences in forms, with working code.
Related tool: CPF ValidatorArticles about JavaScript
JavaScript is a programming language used to create interactive websites, manipulate HTML and CSS elements, and develop dynamic web applications.
JavaScriptHow to validate a credit card with JavaScript (Luhn algorithm)Learn how to validate a credit card number with JavaScript using the Luhn algorithm. A hands-on example, ready-to-use code and what Luhn does not check.
Related tool: Credit Card Validator