JSFiddle - React, Tailwind, and code Playground

by Pavlo

HTML

<button style="width:50px">button1</button>
<button style="width:100px">button2</button>
<button style="width:120px">button3</button>
<button style="width:120px">button4</button>

JavaScript

var greatestWidth = 0;   // Stores the greatest width
         $(".mybutton").each(function() {    // Select the elements you're comparing

             var theWidth = $(this).width();   // Grab the current width
             console.log(theWidth); //this is for checking
             if( theWidth > greatestWidth) {   // If theWidth > the greatestWidth so far,
                 greatestWidth = theWidth;     //    set greatestWidth to theWidth
             }
         });

         $(".mybutton").width(greatestWidth); //finally setting the width