JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" name="fname" id="fname" value="" /><br />
<input type="button" name="mybtn" id="mybtn" value="Click Me" />

JavaScript

$(document).ready(function() {
    myFunc();
});


function myFunc() {
    $('#fname').focus().blur(function() {
        alert('fname onblur alert'); 
    });
    
    $('#mybtn').click(function() {
        alert('mybtn onclick alert'); 
    });
}