Github HideFiles

user.js

// ==UserScript==
// @name         Github HideFiles
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  hide files
// @author       TrueFurby
// @match        https://github.com/*
// @grant        none
// @require      http://code.jquery.com/jquery-latest.js
// ==/UserScript==

(function() {
    'use strict';

    var fileTable = $('.file-wrap>table>tbody:last');
    var count = fileTable.children().length;

    //background: linear-gradient(to bottom, #ebf1f6 0%,#abd3ee 50%,#89c3eb 51%,#d5ebfb 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
    var showBtn = $('<button class="btn" style="background: linear-gradient(to bottom, #3f8faf 0%,#153355 100%) !important;">Hide files</button>');

    $(showBtn).click(function(){
        fileTable.toggle();
        if (fileTable.css('display') == 'none') {
            $(showBtn).text('Show files');
            $(showBtn).removeClass('btn-sm');
        }else{
            $(showBtn).text('Hide files');
            $(showBtn).addClass('btn-sm');
        }
    });

    fileTable.after(function(){
        return '<tfoot class="boxed-group"><tr style="vertical-align:center;"><td style="padding: 0;margin:0;" colspan="4"><span class="text-gray" style="padding:5px 5px;">'+ count +' files</span></td></tr></tfoot>';
    });
    $('.file-wrap>table>tfoot>tr>td>span').before(showBtn);

    if ($('#readme').length && count > 10) {
        showBtn.click();
    }
})();