[RxJS] Reactive Programming - Rendering on the DOM with RxJS 

<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-1.7.2.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/rxjs/4.0.8/rx.all.js"></script>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body>
<div class="container">
    <div class="header">
         <h3>Who to follow</h3><a href="#" class="refresh">Refresh</a>
    </div>
    <ul class="suggestions">
        <li class="suggestion1">
            <img />
            <a href="#" target="_blank" class="username">this will not be displayed</a>
            <a href="#" class="close close1">x</a>
        </li>
        <li class="suggestion2">
            <img />
            <a href="#" target="_blank" class="username">neither this</a>
            <a href="#" class="close close2">x</a>
        </li>
        <li class="suggestion3">
            <img />
            <a href="#" target="_blank" class="username">nor this</a>
            <a href="#" class="close close3">x</a>
        </li>
    </ul>
</div>
</body>
</html>

 

var refreshButton = document.querySelector('.refresh');





var requestStream = Rx.Observable.just('https://api.github.com/users');

var responseStream = requestStream
  .flatMap(requestUrl =>
    Rx.Observable.fromPromise(jQuery.getJSON(requestUrl))
  );

function createSuggestionStream(responseStream) {
  return responseStream.map(listUser =>
    listUser[Math.floor(Math.random()*listUser.length)]
  );
}

var suggestion1Stream = createSuggestionStream(responseStream);
var suggestion2Stream = createSuggestionStream(responseStream);
var suggestion3Stream = createSuggestionStream(responseStream);

function renderSuggestion(userData, selector) {
  var element = document.querySelector(selector);
  var usernameEl = element.querySelector('.username');
  usernameEl.href = userData.html_url;
  usernameEl.textContent = userData.login;
  var imgEl = element.querySelector('img');
  imgEl.src = userData.avatar_url;
}

suggestion1Stream.subscribe(user => {
  renderSuggestion(user, '.suggestion1');
});

suggestion2Stream.subscribe(user => {
  renderSuggestion(user, '.suggestion2');
});

suggestion3Stream.subscribe(user => {
  renderSuggestion(user, '.suggestion3');
});

 

body {
    font-family: sans-serif;
    padding: 10px;
}
h3 {
    font-weight: bold;
    display: inline-block;
  padding: 0;
  margin: 0;
}
.refresh {
    font-size: 80%;
    margin-left: 10px;
}
.header {
    background: #ECECEC;
    padding: 5px;
}
.suggestions {
    border: 2px solid #ECECEC;
}
li {
    padding: 5px;
}
li img {
    width: 40px;
    height: 40px;
    border-radius: 20px;
}
li .username, li .close {
    display: inline-block;
    position: relative;
    bottom: 15px;
    left: 5px;
}

 

posted @ 2016-03-08 03:15  Zhentiw  阅读(240)  评论(0)    收藏  举报