javascript - How to listen for data changes at more than a particular location in Firebase? -

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i using firebase real-time db mobile app i'm developing (js web sdk), structure below in screenshot, key = email, each key have mobile user information, , gps coordination of mobile location inside node = "path"

how listen on the "path" of emails (users)?

enter image description here

straight firebase documents:

value: read , listen changes entire contents of path.

var ref = firebase.database().ref("users"); firebase.database().ref().on('value', function(snapshot) {     // whatever });

this function run once when initiated , once more every change data under path. snapshot return contents of user/ lot of data returned every change. can change ref accordingly.


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