JSFiddle - React, Tailwind, and code Playground

by Exceeder

HTML

<pre id="res"></pre>

CSS

#res { border:#444 1px solid; }

JavaScript

var t = ['http://example.com/whatever#page?x=1&locale=hu&y=2'
,'http://example.com/whatever#page?x=1&locale=hu'
,'http://example.com/whatever#page?locale=hu'
,'http://example.com/whatever#page?locale='
,'http://example.com/whatever#page?x=1'
,'http://example.com/whatever#page'
,'http://example.com/whatever'];

var i, s, r;
for (i=0; i<t.length; i++) {
    s = t[i];
    
    var match = s.match(/#.*[?&]locale=([^&]+)(&|$)/);
    r = (match ? match[1] : "");
    
    //if (s.indexOf('locale=')<0)
    //    r = '';
    //else
    //    r = t[i].replace(/.*?locale=(.*?)(&|$).*/,'$1');
    $('#res').append(r+'\n');
}