JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/ui-lightness/jquery-ui.css">

JavaScript

for( var i=1; i<4; i++ )(function( inner_i ){
  setTimeout( function() { alert( inner_i ); }, 500 * inner_i);
})( i );