JSFiddle - React, Tailwind, and code Playground

HTML

<input id="b1" type="button" value="Hello world" />
<input id="b2" type="button" value="Blubba blib" />
<input id="b3" type="button" value="Bl" />
<input id="b4" type="button" value="Blubba 55" />

JavaScript

$(function() {

        
    $('input:button').click(function() {
        
      $('*').css('font-weight','normal');  
      $(this).css('font-weight','bold');    
      $(this).css('width','-=4px');      
        
    });
    
});