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<!DOCTYPE html>
<html>
<head>
<meta name="description" content="display posts in descending posted order" />
<script src="https://cdn.firebase.com/js/client/1.0.19/firebase.js"></script>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body>
</body>
</html>
 
var fbl = new Firebase('https://stackoverflow.firebaseio.com/25611356');
var ref = fbl.child('sell');
function addChild(value) {
    var child = ref.push();
    child.setWithPriority(value+' '+new Date().toString(), 0 - Date.now());
}
function addChildren() {
  [1, 3, 5, 7, 9].forEach(function(value) {
    setTimeout('addChild('+value+')', value*1000);
  })
}
function deleteChildren() {
  ref.once('value', function(snapshot) {
    snapshot.forEach(function(child) {
      child.ref().remove();
    });
  })
}
fbl.child('sell').startAt().limit(3).on("value", function(fbdata) { 
  console.log('on(value');
  console.log(fbdata.exportVal());
});
fbl.child('sell').startAt().limit(3).on('child_added', function(fbdata) {
  console.log('on(child_added');
  console.log(fbdata.exportVal());
})
//deleteChildren();
//addChildren();
Output 300px

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