JSFiddle - React, Tailwind, and code Playground

HTML

<form>
    <input type="url" name="someUrl" onblur="checkURL(this)" />
    <input type="text"/>
</form>

JavaScript

function checkURL (abc) {
    var string = abc.value;
    console.log(abc);
    if (!~string.indexOf("http")){
        console.log("abcd");
        string = "http://" + string;
    }
    abc.value = string;
    return abc
}