Why isn't a button displayed on small devices using Bootstrap navbar?
<p>I am a Bootstrap novice. On small devices, there is no button to tap for displaying the menu items. If I tap on the upper right-hand side, the menu items are shown. What am I missing?</p>

<p>index.html</p>

<pre><code>&lt;!DOCTYPE html&gt;

&lt;html lang="en" data-ng-app="wtApp"&gt;
    &lt;head&gt;
        &lt;meta charset="utf-8"&gt;
        &lt;meta http-equiv="X-UA-Compatible" content="IE=edge"&gt;
        &lt;meta name="viewport" content="width=device-width, initial-scale=1"&gt;
&lt;!--        &lt;META NAME="ROBOTS" CONTENT="NOINDEX, NOFOLLOW"&gt; --&gt;
        &lt;meta name="fragment" content="!"&gt;
        &lt;meta name="google-site-verification" content="k-yDmol0MzU1QXaTTGlhNa_gVLzUs" /&gt;
        &lt;title&gt;Writer's Tryst, where authors, publishers, producers, agents meet.&lt;/title&gt;
        &lt;meta name="description" content="A better way for writers to find publishers, producers and agents" /&gt;
        &lt;meta name="keywords" content="Writer's Tryst, authors, publishers, producers, agents, writers, genres, manuscripts, books,   find, meet." /&gt;
        &lt;base href="/" /&gt;
        &lt;link  href='https://fonts.googleapis.com/css?family=Lobster+Two:700italic' rel='stylesheet' type='text/css' /&gt;
        &lt;link rel="stylesheet" href="css/bootstrap.min.css"&gt;
        &lt;link rel="stylesheet" href="css/bootstrap-theme.min.css"&gt;
        &lt;link rel="stylesheet" href="css/bootstrap-theme.min.css.map"&gt;
        &lt;link rel="stylesheet" href="css/font-awesome.min.css" /&gt;
        &lt;link rel="stylesheet" href="css/normalize-min.css" /&gt;
        &lt;link rel="stylesheet" href="css/bootstrap-dialog.css" /&gt;
        &lt;link rel="stylesheet" href="css/main.css" /&gt;
        &lt;link rel="stylesheet" href="css/shares.css" /&gt;
        &lt;link rel="shortcut icon" href="img/icons/writers-tryst.png" /&gt;
    &lt;/head&gt;
    &lt;body data-ng-controller="mainController" &gt;
        &lt;script&gt;
            (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
            (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
            m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
            })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');

            ga('create', 'UA-79802711-1', 'auto');
            ga('send', 'pageview');

        &lt;/script&gt;
        &lt;header&gt;
            &lt;nav id="navbar" class="navbar navbar-light navbar-fixed-top"&gt;
                &lt;div class="container-fluid"&gt;
                    &lt;div class="navbar-header"&gt;
                        &lt;button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#Writers-Tryst"&gt;
                            &lt;span class="icon-bar"&gt;&lt;/span&gt; 
                            &lt;span class="icon-bar"&gt;&lt;/span&gt; 
                            &lt;span class="icon-bar"&gt;&lt;/span&gt; 
                        &lt;/button&gt;
                        &lt;div style="display: inline-block"&gt;
                            &lt;a class="navbar-brand" href="#"&gt;&lt;img id="logo" src="img/writers-tryst-logo-min.png" alt="logo" /&gt;&lt;/a&gt;&lt;br/&gt;&lt;br/&gt;
                            &lt;div id="shares" class="row"&gt;   
                                &lt;!-- Twitter --&gt;
                                &lt;a href="http://twitter.com/share?url=writers.tryst.ron-tornambe.com&amp;text=&lt;TEXT&gt;&amp;via=&lt;VIA&gt;" target="_blank" title="twitter" class="share-btn twitter"&gt;
                                    &lt;i class="fa fa-twitter"&gt;&lt;/i&gt;
                                &lt;/a&gt;

                                &lt;!-- Facebook --&gt;
                                &lt;a href="http://www.facebook.com/sharer/sharer.php?u=http://writers.tryst.com" target="_blank" title="facebook" class="share-btn facebook"&gt;
                                    &lt;i class="fa fa-facebook"&gt;&lt;/i&gt;
                                &lt;/a&gt;

                                &lt;!-- StumbleUpon (url, title) 
                                &lt;a href="http://www.stumbleupon.com/submit?url=http://writers.tryst.com&amp;title=&lt;TITLE&gt;" target="_blank" class="share-btn stumbleupon" title="stumble-upon"&gt;
                                    &lt;i class="fa fa-stumbleupon-circle"&gt;&lt;/i&gt;
                                &lt;/a&gt; --&gt;
                                &lt;!-- Reddit (url, title)
                                &lt;a href="http://reddit.com/submit?url=http://writers.tryst.com&amp;title=&lt;TITLE&gt;" target="_blank" class="share-btn reddit" title="reddit"&gt;
                                    &lt;i class="fa fa-reddit-square"&gt;&lt;/i&gt;
                                &lt;/a&gt;  --&gt;
                                &lt;!-- LinkedIn --&gt;
                                &lt;a href="http://www.linkedin.com/shareArticle?url=http://writers.tryst.com&amp;title=&lt;TITLE&gt;&amp;summary=&lt;SUMMARY&gt;&amp;source=&lt;SOURCE_URL&gt;" target="_blank" title="linked-in" class="share-btn linkedin"&gt;
                                    &lt;i class="fa fa-linkedin"&gt;&lt;/i&gt;
                                &lt;/a&gt;
                                &lt;!-- Google Plus --&gt;
                                &lt;a href="https://plus.google.com/share?url=writers.tryst.ron-tornambe.com" target="_blank" title="google+" class="share-btn google-plus"&gt;
                                    &lt;i class="fa fa-google-plus"&gt;&lt;/i&gt;
                                &lt;/a&gt;
                            &lt;/div&gt;
                        &lt;/div&gt;
                    &lt;/div&gt; &lt;!--navbar-header--&gt;
                    &lt;div class="collapse navbar-collapse" id="Writers-Tryst"&gt;
                        &lt;ul class="nav navbar-nav"&gt;
                            &lt;li class="active"&gt;&lt;a id="homepage" href="#/"&gt;&lt;i class="acctive glyphicon glyphicon-home fa fa-home"&gt;&lt;/i&gt; Home&lt;/a&gt;&lt;/li&gt;
                            &lt;li&gt;&lt;a href="#writers" id="writers-link" class="fa fa-book" &gt; Writers&lt;/a&gt;&lt;/li&gt; 
                            &lt;li&gt;&lt;a href="#enablers" id="enablers-link" class="fa fa-thumbs-o-up" &gt; Enablers&lt;/a&gt;&lt;/li&gt; 
                            &lt;li&gt;&lt;a href="#about" class="fa fa-info-circle"&gt; About&lt;/a&gt;&lt;/li&gt; 
                            &lt;li&gt;&lt;a href="#privacy" class="fa fa-user-secret"&gt; Privacy/Rules&lt;/a&gt;&lt;/li&gt; 
                            &lt;li&gt;&lt;a href="#contact" class="fa fa-envelope-o"&gt; Contact&lt;/a&gt;&lt;/li&gt; 
                        &lt;/ul&gt;
                        &lt;ul class="nav navbar-nav navbar-right"&gt;
                            &lt;li&gt;&lt;a id="login" href="#log-in"&gt;&lt;i class="fa fa-sign-in"&gt;&lt;/i&gt; Log-In&lt;/a&gt;&lt;/li&gt; 
                            &lt;li&gt;&lt;a id="accounts-link" href="#accounts"&gt;&lt;i class="fa fa-user hidden"&gt;&lt;/i&gt; Create Account&lt;/a&gt;&lt;/li&gt; 
                            &lt;li class="dropdown" data-toggle="popover" data-trigger="hover" data-placement="bottom" &gt;
                                &lt;button class="btn btn-custom-primary dropdown-toggle fa fa-user" style="margin-top: 8px; color: white;" data-html="true" type="button" id="user-dropdown-link" data-toggle="dropdown"&gt;&lt;span class="caret"&gt;&lt;/span&gt;&lt;/button&gt;&lt;/a&gt;
                                &lt;ul class="dropdown-menu" role="menu" data-aria-labelledby="create-account-link"&gt;
                                    &lt;li&gt;&lt;a id="update-profile" href="#update-profile" class="fa fa-database"&gt; Update profile&lt;/a&gt;&lt;/li&gt;
                                    &lt;li&gt;&lt;a id="manage-uploads" href="#manage-uploads" class="fa fa-book"&gt; Manage uploads&lt;/a&gt;&lt;/li&gt;
                                    &lt;li&gt;&lt;a id="review-submissions" href="#review-submissions" class="fa fa-book"&gt; Review Submissions&lt;/a&gt;&lt;/li&gt;
                                    &lt;li&gt;&lt;a id="update-submissions" href="#update-submissions" class="fa fa-book"&gt; Update Reviews&lt;/a&gt;&lt;/li&gt;
                                &lt;/ul&gt;
                            &lt;/li&gt;
                            &lt;li &gt;&lt;a id="reset-pwd-link" href="#reset-pwd"&gt;&lt;/a&gt;&lt;/li&gt; 
                        &lt;/ul&gt;
                    &lt;/div&gt; &lt;!--navbar-collapse--&gt;
                &lt;/div&gt; &lt;!--container fluid--&gt;
            &lt;/nav&gt;
        &lt;/header&gt;
        &lt;div&gt;
            &lt;div id="message" class="alert m-t-10 m-b-10"&gt;&lt;/div&gt; 
            &lt;div id="main" class="content container"&gt;
                &lt;!-- angular templating --&gt;
                &lt;!-- this is where content will be injected --&gt;
                &lt;div data-ng-view&gt;&lt;/div&gt;
            &lt;/div&gt;
            &lt;footer class="panel panel-default panel-transparent"&gt;
                &lt;div id="foot1" class="text-right small"&gt;&amp;#169; 2016 Ronald Tornambe, Inc.&lt;/div&gt;
            &lt;/footer&gt;
        &lt;/div&gt;
        &lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"&gt;&lt;/script&gt;
        &lt;script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.7/angular.min.js"&gt;&lt;/script&gt;
        &lt;script src="//ajax.googleapis.com/ajax/libs/angularjs/1.5.7/angular-route.js"&gt;&lt;/script&gt;
        &lt;script src="js/bootstrap.min.js"&gt;&lt;/script&gt;
        &lt;script src="js/bootstrap-dialog.js"&gt;&lt;/script&gt;
        &lt;script defer src="js/recaptcha.js"&gt;&lt;/script&gt;
        &lt;script async defer src="https://use.fontawesome.com/9f2a0d923f.js"&gt;&lt;/script&gt;
        &lt;script defer src="js/pages.js"&gt;&lt;/script&gt;
        &lt;script defer src="js/common.js"&gt;&lt;/script&gt;
        &lt;script&gt;
            $("#drop-toggle-1").on("click", function (e) {
                e.preventDefault();
            });
            $("#accounts-link").addClass("hidden");
            $(function () {
                $("#review-submissions").on("mousedown", function () {
                    sessionStorage.setItem("submissions", "review");
                });
                $("#update-submissions").on("mousedown", function () {
                    sessionStorage.setItem("submissions", "update");
                });
                setupPage();
            });
        &lt;/script&gt;        
    &lt;/body&gt;
&lt;/html&gt;
</code></pre>