无法将数据推送到Firebase onclick

您正在处理异步数据流,因此您应该监听submitPost函数之外的数据.

var myDataRef = new Firebase('https://EXAMPLE.firebaseio.com/');
myDataRef.on('child_added', function(snapshot) {
  var post = snapshot.val();
  displayUserPost(post.name, post.text);
});

function submitPost(e) {
  var myDataRef = new Firebase('https://EXAMPLE.firebaseio.com/');
  var name = $('#titleInput').val();
  var text = $('#postInput').val();
  myDataRef.push({name: name, text: text});
  $('#postInput').val('');
  e.preventDefault();
}

function displayUserPost(name, text) {
  $('
').text(text).prepend($('').text(name+': ')).appendTo($('#PostsDiv'));
  $('#PostsDiv')[0].scrollTop = $('#PostsDiv')[0].scrollHeight;
}