JSFiddle - React, Tailwind, and code Playground

by Ehsan Sajjad

HTML

<form action="" id="myForm">
    Use <code>return false</code> (if not checked, <code>e.preventDefault()</code> will be used): <input type="checkbox" id="myCheckbox" checked><br/>
    <input type="submit" value="Submit me">
</form>

JavaScript

document.getElementById("myForm").addEventListener("submit", function (e) {
    if (document.getElementById("myCheckbox").checked) {
        return false;    
    }
    e.preventDefault();
});