JSFiddle - React, Tailwind, and code Playground
JavaScript
var fooPath = 'https://YourBigUrl.com/sites/tcca/WikiPedia/Pages/A*';
//alert(fooPath.toLowerCase().split('*')[0].substr(0,1));
//lastIndexOf
alert(fooPath.substring(fooPath.lastIndexOf('/')+1,fooPath.lastIndexOf('/')+2));