JSFiddle - React, Tailwind, and code Playground

by Sameera Thilakasiri

JavaScript

function warning() {
    a = document.createElement('div');
    document.body.appendChild(a);
    a.id = 'warning';
    a.className= 'warning';
}

warning();

warningDiv = document.getElementById('warning');

if(document.getElementById('warning')) {
    alert('warning div on DOM')
};