javascript - 新 Firebase 失败 : First argument must be a valid firebase URL and the path can't contain ".", "#"、 "$"、 "["或 "]"

Question

我正在使用 Firebase 来检查状态，但控制台抛出以下错误:

New Firebase failed: First argument must be a valid firebase URL and the path can't contain ".", "#", "$", "[", or "]".

以下是代码:

new Firebase("https://123654789.firebaseio.com/123654/.info/connected").on('value', function(connectedSnap) {
  console.log(connectedSnap.val());
  if (connectedSnap.val() === true) {
    alert('I am connected!');
  } else {
    /* we're disconnected! */
    alert('not connected!');
  }
});

Answer 1

.info/connected 路径仅存在于 Firebase 数据的顶层。您无法从子节点访问它。

所以改变

new Firebase("https://123654789.firebaseio.com/123654/.info/connected")

至

new Firebase("https://123654789.firebaseio.com/.info/connected")

错误消息将会消失。