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HTML

              
                <body>
  <div id="w">
    <h1>Simple Github API Webapp</h1>
    <p>Enter a single Github username below and click the button to display profile info via JSON.</p>
    
    <input type="text" name="ghusername" id="ghusername" placeholder="Github username...">
    
    <a href="#" id="ghsubmitbtn">Pull User Data</a>
    
    <div id="ghapidata" class="clearfix"></div>
  </div>
</body>
              
            
!

CSS

              
                @import url('https://fonts.googleapis.com/css?family=Oldenburg');

html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
  outline: none;
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
html { overflow-y: scroll; }
body {
  background: #fafafa url('https://i.imgur.com/l92k33u.png'); /* https://subtlepatterns.com/subtle-grey/ */
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 62.5%;
  line-height: 1;
  color: #616161;
  padding: 35px 0;
}

br { display: block; line-height: 1.6em; } 

article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section { display: block; }
ol, ul { list-style: none; }

input, textarea { 
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  outline: none; 
}

blockquote, q { quotes: none; }
blockquote:before, blockquote:after, q:before, q:after { content: ''; content: none; }
strong, b { font-weight: bold; } 

table { border-collapse: collapse; border-spacing: 0; }
img { border: 0; max-width: 100%; }

h1 { 
  font-family: 'Oldenburg', Arial, sans-serif;
  color: #646464;
  font-size: 4.0em;
  line-height: 1.6em;
  margin-bottom: 10px;
}

h2 {
  font-size: 2.8em;
  line-height: 1.55em;
  margin-bottom: 4px;
  color: #888;
}

p {
  font-size: 1.4em;
  line-height: 1.55em;
  margin-bottom: 12px;
}

a { 
  color: #8eadd2;
}
a:hover {
  color: #6e91b9;
}


/* page structure */
#w {
  display: block;
  width: 800px;
  margin: 0 auto;
  background: #fff;
  padding: 15px 25px;
  -webkit-box-shadow: 1px 2px 3px -1px rgba(0,0,0,0.4);
  -moz-box-shadow: 1px 2px 3px -1px rgba(0,0,0,0.4);
  box-shadow: 1px 2px 3px -1px rgba(0,0,0,0.4);
  -webkit-border-radius: 4px;
  -moz-border-radius: 4px;
  border-radius: 4px;
}

#ghapidata {
  display: block;
  padding: 25px 0;
}

#loader {
  display: block;
  width: 200px;
  height: 200px;
  margin: 0 auto;
}


/* page content styles */
.smallname {
  font-size: 0.75em;
  color: #a9a9a9;
  font-style: italic;
}

.avi {
  float: left;
  margin-right: 7px;
  margin-bottom: 7px;
}
.avi img {
  border: 1px solid #ccc;
  padding: 3px;
}

.repolist {
  display: block;
  clear: both;
  width: 100%;
}
.repolist ul {
  font-size: 1.2em;
}
.repolist ul li {
  display: block;
}
.repolist ul li a {
  font-weight: bold;
  padding: 6px 9px;
  display: block;
  float: left;
  margin-right: 10px;
  margin-bottom: 10px;
  text-decoration: none;
  border: 1px solid #356492;
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  border-radius: 3px;
  color: #fff;
  background-color: #3673af;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#5597d8), to(#3673af));
  background-image: -webkit-linear-gradient(top, #5597d8, #3673af);
  background-image: -moz-linear-gradient(top, #5597d8, #3673af);
  background-image: -ms-linear-gradient(top, #5597d8, #3673af);
  background-image: -o-linear-gradient(top, #5597d8, #3673af);
  background-image: linear-gradient(top, #5597d8, #3673af);
}
.repolist ul li a:hover {
  background-color: #396895;
  background-image: -webkit-gradient(linear, left top, left bottom, from(#4b87c2), to(#396895));
  background-image: -webkit-linear-gradient(top, #4b87c2, #396895);
  background-image: -moz-linear-gradient(top, #4b87c2, #396895);
  background-image: -ms-linear-gradient(top, #4b87c2, #396895);
  background-image: -o-linear-gradient(top, #4b87c2, #396895);
  background-image: linear-gradient(top, #4b87c2, #396895);
}
.repolist ul li a:active {
  -webkit-box-shadow: inset 0 3px 5px rgba(0,0,0,0.25);
  -moz-box-shadow: inset 0 3px 5px rgba(0,0,0,0.25);
  box-shadow: inset 0 3px 5px rgba(0,0,0,0.25);
}

.repolist ul li a span {
  font-family: "Courier New", Courier, "Lucida Typewriter", monospace;
  font-size: 0.9em;
}

/* input field */
#ghusername {
  display: block;
  padding: 5px 8px;
  font-size: 1.4em;
  color: #666;
  width: 550px;
  margin-bottom: 15px;
}

#ghsubmitbtn {
  display: inline-block;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: bold;
  color: #444;
  text-decoration: none;
  text-shadow: 0 1px 0 rgba(255,255,255,0.8);
  background-color: #eaeaea;
  background-image: -webkit-linear-gradient(#fafafa, #eaeaea);
  background-image: -moz-linear-gradient(#fafafa, #eaeaea);
  background-image: -ms-linear-gradient(top, #fafafa, #eaeaea);
  background-image: -o-linear-gradient(top, #fafafa, #eaeaea);
  background-image: linear-gradient(#fafafa, #eaeaea);
  border-radius: 3px;
  border: 1px solid #ddd;
  border-bottom-color: #c5c5c5;
  -webkit-box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  -moz-box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
#ghsubmitbtn:hover {
  background-color: #dadada;
  background-image: -webkit-linear-gradient(#eaeaea, #dadada);
  background-image: -moz-linear-gradient(#eaeaea, #dadada);
  background-image: -ms-linear-gradient(top, #eaeaea, #dadada);
  background-image: -o-linear-gradient(top, #eaeaea, #dadada);
  background-image: linear-gradient(#eaeaea, #dadada);
  border-color: #ccc #ccc #b5b5b5;
}
#ghsubmitbtn:active {
  background-color:#dadada;
  background-image: none;
  border-color: #b5b5b5;
  -webkit-box-shadow: inset 0 3px 5px rgba(0,0,0,0.25);
  -moz-box-shadow: inset 0 3px 5px rgba(0,0,0,0.25);
  box-shadow: inset 0 3px 5px rgba(0,0,0,0.25);
}

/* clearfix */
.clearfix:after { content: "."; display: block; clear: both; visibility: hidden; line-height: 0; height: 0; }
.clearfix { display: inline-block; }
 
html[xmlns] .clearfix { display: block; }
* html .clearfix { height: 1%; }
              
            
!

JS

              
                $(function(){
  $('#ghsubmitbtn').on('click', function(e){
    e.preventDefault();
    $('#ghapidata').html('<div id="loader"><img src="https://i.imgur.com/UqLN6nl.gif" alt="loading..."></div>');
    
    var username = $('#ghusername').val();
    var requri   = 'https://api.github.com/users/'+username;
    var repouri  = 'https://api.github.com/users/'+username+'/repos';
    
    requestJSON(requri, function(json) {
      if(json.message == "Not Found" || username == '') {
        $('#ghapidata').html("<h2>No User Info Found</h2>");
      }
      
      else {
        // else we have a user and we display their info
        var fullname   = json.name;
        var username   = json.login;
        var aviurl     = json.avatar_url;
        var profileurl = json.html_url;
        var location   = json.location;
        var followersnum = json.followers;
        var followingnum = json.following;
        var reposnum     = json.public_repos;
        
        if(fullname == undefined) { fullname = username; }
        
        var outhtml = '<h2>'+fullname+' <span class="smallname">(@<a href="'+profileurl+'" target="_blank">'+username+'</a>)</span></h2>';
        outhtml = outhtml + '<div class="ghcontent"><div class="avi"><a href="'+profileurl+'" target="_blank"><img src="'+aviurl+'" width="80" height="80" alt="'+username+'"></a></div>';
        outhtml = outhtml + '<p>Followers: '+followersnum+' - Following: '+followingnum+'<br>Repos: '+reposnum+'</p></div>';
        outhtml = outhtml + '<div class="repolist clearfix">';
        
        var repositories;
        $.getJSON(repouri, function(json){
          repositories = json;   
          outputPageContent();                
        });          
        
        function outputPageContent() {
          if(repositories.length == 0) { outhtml = outhtml + '<p>No repos!</p></div>'; }
          else {
            outhtml = outhtml + '<p><strong>Repos List:</strong></p> <ul>';
            $.each(repositories, function(index) {
              outhtml = outhtml + '<li><a href="'+repositories[index].html_url+'" target="_blank">'+repositories[index].name + '</a></li>';
            });
            outhtml = outhtml + '</ul></div>'; 
          }
          $('#ghapidata').html(outhtml);
        } // end outputPageContent()
      } // end else statement
    }); // end requestJSON Ajax call
  }); // end click event handler
  
  function requestJSON(url, callback) {
    $.ajax({
      url: url,
      complete: function(xhr) {
        callback.call(null, xhr.responseJSON);
      }
    });
  }
});
              
            
!
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