JSFiddle - React, Tailwind, and code Playground

HTML

<form onsubmit="localstorageSave()">
<p><input id="fname" type="text" name="fname" value="abc"/></p>
<p><input type="submit" value="Submit"/></p>
</form>

JavaScript

(function(){
    if(localStorage.getItem("value") != null){
        document.getElementById("fname").value = localStorage.getItem("value")
    }
})()
localstorageSave = function(){
    localStorage.setItem("value", document.getElementById("fname").value );
}