JSFiddle - React, Tailwind, and code Playground

by damir aushenov

HTML

<form action="https://vk.com/verstka_html" id="frmContract" method="post" >
    <input type="text" id="email">
      <input type="submit">  
        
    
    <span id="errorMessage"></span>
</form>

JavaScript

document.getElementById("frmContract").onsubmit = function() {
    
    if(document.getElementById("email").value == "") {
        document.getElementById("errorMessage").innerHTML = "Please give a registration here";
        return false;
    }else {
        document.getElementById("errorMessage").innerHTML = "";
        return true;
    }
};