alphanumeric validation JavaScript JS
Alphanumeric validation in JavaScript is used to make sure that all the characters entered in the specified field must be any alphabet (A-Z or a-z) or any number (0-9). Regular Expression: /^[0-9a-zA-Z]+$/ Example: <!DOCTYPE html> <html lang=”en”> <head> <script> function lettersNumbersCheck(name) { var regEx = /^[0-9a-zA-Z]+$/; if(name.value.match(regEx)) { return true; } else { alert(“Please enter … Read more