JSFiddle - React, Tailwind, and code Playground

JavaScript

//Please check in Chrome Console.
//checked in Version 22.0.1229.94
$.ajax({
    dataType: 'xml',
    type: 'GET',
    url: 'https://gdata.youtube.com/schemas/2007/categories.cat',
    success: function(responseXml) {
        console.log(responseXml);

        var assignableCategories = $(responseXml).find('atom\\:category:has(yt\\:assignable), category:has(assignable)');
       console.log(assignableCategories); //These should be found and work in 1.7.2
    },
    error: function(jqXHR) {
        
    }
});