Mastering Email Validation in JavaScript with onchange Event: A Comprehensive Guide

 

Mastering Email Validation in JavaScript with onchange Event: A Comprehensive Guide


<input type="email" id="emailInput" onchange="validateEmail()">

<span id="emailError" style="color: red;"></span> <script> function validateEmail() { const emailInput = document.getElementById("emailInput"); const emailError = document.getElementById("emailError"); const emailPattern = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/; if (!emailPattern.test(emailInput.value)) { emailError.textContent = "Invalid email format"; } else { emailError.textContent = ""; } } </script>

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