mirror of
https://github.com/wassname/DefinitelyTyped.git
synced 2026-09-11 11:50:54 +08:00
update firebase/firebase.d.ts to version 2.0.2
This commit is contained in:
in-async
+804
-9
@@ -11,6 +11,152 @@ dataRef.auth(AUTH_TOKEN, function(error, result) {
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}
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});
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var firebaseRef = new Firebase('https://samplechat.firebaseio-demo.com/');
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/*
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* Firebase.authWithCustomToken()
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*/
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() => {
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var dataRef = new Firebase('https://samplechat.firebaseio-demo.com');
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// Log me in
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dataRef.authWithCustomToken(AUTH_TOKEN, function (error, authData) {
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if (error) {
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console.log('Login Failed!', error);
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} else {
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console.log('Authenticated successfully with payload:', authData);
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}
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});
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}
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/*
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* Firebase.authAnonymously()
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*/
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() => {
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var dataRef = new Firebase('https://samplechat.firebaseio-demo.com');
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// Log me in
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dataRef.authAnonymously(function (error, authData) {
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if (error) {
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console.log('Login Failed!', error);
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} else {
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console.log('Authenticated successfully with payload:', authData);
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}
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});
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}
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/*
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* Firebase.authWithPassword()
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*/
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() => {
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var dataRef = new Firebase('https://samplechat.firebaseio-demo.com');
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// Log me in
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dataRef.authWithPassword({
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"email": "bobtony@firebase.com",
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"password": "correcthorsebatterystaple"
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}, function (error, authData) {
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if (error) {
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console.log('Login Failed!', error);
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} else {
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console.log('Authenticated successfully with payload:', authData);
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}
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});
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}
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/*
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* Firebase.authWithOAuthPopup()
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*/
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() => {
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var dataRef = new Firebase('https://samplechat.firebaseio-demo.com');
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// Log me in
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dataRef.authWithOAuthPopup("twitter", function (error, authData) {
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if (error) {
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console.log('Login Failed!', error);
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} else {
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console.log('Authenticated successfully with payload:', authData);
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}
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});
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}
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/*
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* Firebase.authWithOAuthRedirect
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*/
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() => {
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var dataRef = new Firebase('https://samplechat.firebaseio-demo.com');
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// Log me in
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dataRef.authWithOAuthRedirect("twitter", function (error) {
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if (error) {
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console.log('Login Failed!', error);
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} else {
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// We'll never get here, as the page will redirect on success.
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}
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});
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}
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/*
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* Firebase.authWithOAuthToken()
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*/
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() => {
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var dataRef = new Firebase('https://samplechat.firebaseio-demo.com');
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// Authenticate with Facebook using an existing OAuth 2.0 access token
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dataRef.authWithOAuthToken("facebook", "<ACCESS-TOKEN>", function (error, authData) {
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if (error) {
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console.log('Login Failed!', error);
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} else {
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console.log('Authenticated successfully with payload:', authData);
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}
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});
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}
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() => {
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var dataRef = new Firebase('https://samplechat.firebaseio-demo.com');
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// Authenticate with Twitter using an existing OAuth 1.0a credential set
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dataRef.authWithOAuthToken("twitter", {
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"user_id": "<USER-ID>",
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"oauth_token": "<ACCESS-TOKEN>",
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"oauth_token_secret": "<ACCESS-TOKEN-SECRET>",
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}, function (error, authData) {
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if (error) {
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console.log('Login Failed!', error);
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} else {
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console.log('Authenticated successfully with payload:', authData);
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}
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});
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}
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/*
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* Firebase.getAuth()
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*/
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() => {
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var dataRef = new Firebase('https://samplechat.firebaseio-demo.com');
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var authData = dataRef.getAuth();
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if (authData) {
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console.log('Authenticated user with uid:', authData.uid);
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}
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}
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/*
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* Firebase.onAuth()
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*/
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() => {
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var firebaseRef = new Firebase('https://samplechat.firebaseio-demo.com');
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firebaseRef.onAuth(function (authData) {
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if (authData) {
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console.log('Client is authenticated with uid ' + authData.uid);
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} else {
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// Client is unauthenticated
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}
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});
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}
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/*
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* Firebase.offAuth
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*/
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() => {
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var firebaseRef = new Firebase('https://samplechat.firebaseio-demo.com');
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var onAuthChange = function (authData: IFirebaseAuthData) { /*...*/ };
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firebaseRef.onAuth(onAuthChange);
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// Sometime later...
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firebaseRef.offAuth(onAuthChange);
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}
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//Time to log out!
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dataRef.unauth();
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@@ -36,6 +182,146 @@ var fredRef3:Firebase = new Firebase('https://SampleChat.firebaseIO-demo.com/use
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var x4:string = fredRef3.name();
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// x is now 'fred'.
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/*
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* Firebase.key()
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*/
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() => {
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var fredRef = new Firebase("https://samplechat.firebaseio-demo.com/users/fred");
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var key = fredRef.key(); // key === "fred"
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key = fredRef.child("name/last").key(); // key === "last"
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}
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() => {
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// Calling key() on the root of a Firebase will return null:
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var rootRef = new Firebase("https://samplechat.firebaseio-demo.com");
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var key = rootRef.key(); // key === null
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}
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/*
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* Firebase.set()
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*/
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() => {
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var fredNameRef = new Firebase('https://samplechat.firebaseio-demo.com/users/fred/name');
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fredNameRef.child('first').set('Fred');
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fredNameRef.child('last').set('Flintstone');
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// We've written 'Fred' to the Firebase location storing fred's first name,
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// and 'Flintstone' to the location storing his last name
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}
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() => {
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var fredNameRef = new Firebase('https://samplechat.firebaseio-demo.com/users/fred/name');
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fredNameRef.set({ first: 'Fred', last: 'Flintstone' });
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// Exact same effect as the previous example, except we've written
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// fred's first and last name simultaneously
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}
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() => {
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var fredNameRef = new Firebase('https://samplechat.firebaseio-demo.com/users/fred/name');
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var onComplete = function (error: any) {
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if (error) {
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console.log('Synchronization failed');
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} else {
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console.log('Synchronization succeeded');
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}
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};
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fredNameRef.set({ first: 'Fred', last: 'Flintstone' }, onComplete);
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// Same as the previous example, except we will also log a message
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// when the data has finished synchronizing
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}
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/*
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* Firebase.update()
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*/
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() => {
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var fredNameRef = new Firebase('https://samplechat.firebaseio-demo.com/users/fred/name');
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// Modify the 'first' and 'last' children, but leave other data at fredNameRef unchanged
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fredNameRef.update({ first: 'Fred', last: 'Flintstone' });
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}
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() => {
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var fredNameRef = new Firebase('https://samplechat.firebaseio-demo.com/users/fred/name');
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// Same as the previous example, except we will also display an alert
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// message when the data has finished synchronizing.
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var onComplete = function (error:any) {
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if (error) {
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console.log('Synchronization failed');
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} else {
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console.log('Synchronization succeeded');
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}
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};
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fredNameRef.update({ first: 'Wilma', last: 'Flintstone' }, onComplete);
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}
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() => {
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var fredRef = new Firebase('https://samplechat.firebaseio-demo.com/users/fred');
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//The following 2 function calls are equivalent
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fredRef.update({ name: { first: 'Fred', last: 'Flintstone' }});
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fredRef.child('name').set({ first: 'Fred', last: 'Flintstone' });
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}
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/*
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* Firebase.remove()
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*/
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() => {
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var fredRef = new Firebase('https://samplechat.firebaseio-demo.com/users/fred');
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fredRef.remove();
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// All data at the Firebase location for user 'fred' has been deleted
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// (including any child data)
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}
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() => {
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var onComplete = function (error: any) {
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if (error) {
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console.log('Synchronization failed');
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} else {
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console.log('Synchronization succeeded');
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}
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};
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fredRef.remove(onComplete);
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// Same as the previous example, except we will also log
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// a message when the delete has finished synchronizing
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}
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/*
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* Firebase.push()
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*/
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() => {
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var messageListRef = new Firebase('https://samplechat.firebaseio-demo.com/message_list');
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var newMessageRef = messageListRef.push();
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newMessageRef.set({ 'user_id': 'fred', 'text': 'Yabba Dabba Doo!' });
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// We've appended a new message to the message_list location.
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var path = newMessageRef.toString();
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// path will be something like
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// 'https://samplechat.firebaseio-demo.com/message_list/-IKo28nwJLH0Nc5XeFmj'
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}
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() => {
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var messageListRef = new Firebase('https://SampleChat.firebaseIO-demo.com/message_list');
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messageListRef.push({ 'user_id': 'fred', 'text': 'Yabba Dabba Doo!' });
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// Same effect as the previous example, but we've combined the push() and the set().
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}
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/*
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* Firebase.setWithPriority()
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*/
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() => {
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var fredRef = new Firebase('https://samplechat.firebaseio-demo.com/users/fred');
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var user = {
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name: {
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first: 'Fred',
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last: 'Flintstone'
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},
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rank: 1000
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};
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fredRef.setWithPriority(user, 1000);
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// We've written Fred's name and rank to firebase, and used his rank (1000) as the
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// priority of the data so he'll be ordered relative to other users by his rank
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}
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/*
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* Firebase.setPriority()
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*/
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() => {
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var fredRef = new Firebase('https://samplechat.firebaseio-demo.com/users/fred');
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fredRef.setPriority(1000);
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// We have changed the priority of fred's user data to 1000
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}
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// Increment Fred's rank by 1.
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var fredRankRef:Firebase = new Firebase('https://SampleChat.firebaseIO-demo.com/users/fred/rank');
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fredRankRef.transaction(function(currentRank: number) {
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@@ -61,14 +347,523 @@ wilmaRef.transaction(function(currentData) {
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console.log('Wilma\'s data: ', snapshot.val());
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});
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var messageListRef: Firebase = new Firebase('https://SampleChat.firebaseIO-demo.com/message_list');
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var lastMessagesQuery:IFirebaseQuery = messageListRef.endAt().limit(500);
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lastMessagesQuery.on('child_added', function(childSnapshot: IFirebaseDataSnapshot) { /* handle child add */ });
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/*
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* Firebase.createUser()
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*/
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() => {
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var firebaseRef = new Firebase('https://samplechat.firebaseio-demo.com');
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firebaseRef.createUser({
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email: "bobtony@firebase.com",
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password: "correcthorsebatterystaple"
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}, function (err) {
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if (err) {
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switch (err.code) {
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case 'EMAIL_TAKEN':
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// The new user account cannot be created because the email is already in use.
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case 'INVALID_EMAIL':
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// The specified email is not a valid email.
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default:
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}
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} else {
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// User account created successfully!
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}
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});
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}
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var messageListRef2:Firebase = new Firebase('https://SampleChat.firebaseIO-demo.com/message_list');
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var firstMessagesQuery:IFirebaseQuery = messageListRef2.startAt().limit(500);
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firstMessagesQuery.on('child_added', function(childSnapshot: IFirebaseDataSnapshot) { /* handle child add */ });
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/*
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* Firebase.changePassword()
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*/
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() => {
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var firebaseRef = new Firebase('https://samplechat.firebaseio-demo.com');
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firebaseRef.changePassword({
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email: "bobtony@firebase.com",
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oldPassword: "correcthorsebatterystaple",
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newPassword: "shinynewpassword"
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}, function (err) {
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if (err) {
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switch (err.code) {
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case 'INVALID_PASSWORD':
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// The specified user account password is incorrect.
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case 'INVALID_USER':
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// The specified user account does not exist.
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default:
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}
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} else {
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// User password changed successfully!
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}
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});
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}
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var usersRef3: Firebase = new Firebase('https://SampleChat.firebaseIO-demo.com/users');
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var usersQuery: IFirebaseQuery = usersRef3.startAt(1000).limit(50);
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usersQuery.on('child_added', function(userSnapshot: IFirebaseDataSnapshot) { /* handle user */ });
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/*
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* Firebase.removeUser()
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*/
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() => {
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var firebaseRef = new Firebase('https://samplechat.firebaseio-demo.com');
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firebaseRef.removeUser({
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email: "bobtony@firebase.com",
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password: "correcthorsebatterystaple"
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}, function (err) {
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if (err) {
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switch (err.code) {
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case 'INVALID_USER':
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// The specified user account does not exist.
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case 'INVALID_PASSWORD':
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// The specified user account password is incorrect.
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default:
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}
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} else {
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// User account deleted successfully!
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}
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});
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}
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/*
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* Firebase.resetPassword()
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*/
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() => {
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var firebaseRef = new Firebase('https://samplechat.firebaseio-demo.com');
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firebaseRef.resetPassword({
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email: "bobtony@firebase.com"
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}, function (err) {
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if (err) {
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switch (err.code) {
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case 'INVALID_USER':
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// The specified user account does not exist.
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default:
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}
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} else {
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// Password reset email sent successfully!
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}
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});
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}
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//var messageListRef: Firebase = new Firebase('https://SampleChat.firebaseIO-demo.com/message_list');
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//var lastMessagesQuery:IFirebaseQuery = messageListRef.endAt().limit(500);
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//lastMessagesQuery.on('child_added', function(childSnapshot: IFirebaseDataSnapshot) { /* handle child add */ });
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//var messageListRef2:Firebase = new Firebase('https://SampleChat.firebaseIO-demo.com/message_list');
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//var firstMessagesQuery:IFirebaseQuery = messageListRef2.startAt().limit(500);
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//firstMessagesQuery.on('child_added', function(childSnapshot: IFirebaseDataSnapshot) { /* handle child add */ });
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//var usersRef3: Firebase = new Firebase('https://SampleChat.firebaseIO-demo.com/users');
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//var usersQuery: IFirebaseQuery = usersRef3.startAt(1000).limit(50);
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//usersQuery.on('child_added', function(userSnapshot: IFirebaseDataSnapshot) { /* handle user */ });
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/*
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* Firebase.goOffline()
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* Firebase.goOnline()
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*/
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||||
() => {
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var usersRef = new Firebase('https://samplechat.firebaseio-demo.com/users');
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Firebase.goOffline(); // All Firebase instances are disconnected
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Firebase.goOnline(); // All Firebase instances automatically reconnect
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}
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/*
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* IFirebaseQuery.on()
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*/
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() => {
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firebaseRef.on('value', function (dataSnapshot) {
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// code to handle new value.
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});
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firebaseRef.on('child_added', function (childSnapshot, prevChildName) {
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// code to handle new child.
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});
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firebaseRef.on('child_removed', function (oldChildSnapshot) {
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||||
// code to handle child removal.
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||||
});
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||||
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||||
firebaseRef.on('child_changed', function (childSnapshot, prevChildName) {
|
||||
// code to handle child data changes.
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||||
});
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||||
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||||
firebaseRef.on('child_changed', function (childSnapshot, prevChildName) {
|
||||
// code to handle child data changes.
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||||
});
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||||
}
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||||
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||||
/*
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||||
* IFirebaseQuery.off()
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||||
*/
|
||||
() => {
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var onValueChange = function (dataSnapshot: IFirebaseDataSnapshot) { /* handle... */ };
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||||
firebaseRef.on('value', onValueChange);
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||||
// Sometime later...
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||||
firebaseRef.off('value', onValueChange);
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}
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||||
() => {
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// Or you can save a line of code by using an inline function
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||||
// and on()'s return value.
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||||
var onValueChange = firebaseRef.on('value', function (dataSnapshot) { /* handle... */ });
|
||||
// Sometime later...
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||||
firebaseRef.off('value', onValueChange);
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||||
}
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||||
/*
|
||||
* IFirebaseQuery.once()
|
||||
*/
|
||||
() => {
|
||||
// Basic usage of .once() to read the data located at firebaseRef.
|
||||
firebaseRef.once('value', function (dataSnapshot) {
|
||||
// handle read data.
|
||||
});
|
||||
}
|
||||
() => {
|
||||
// Provide a failureCallback to be notified when this
|
||||
// callback is revoked due to security violations.
|
||||
firebaseRef.once('value', function (dataSnapshot) {
|
||||
// code to handle new value
|
||||
}, function (err: any) {
|
||||
// code to handle read error
|
||||
});
|
||||
}
|
||||
() => {
|
||||
// Provide a context to override "this" when callbacks are triggered.
|
||||
firebaseRef.once('value', function (dataSnapshot) {
|
||||
// this.x is 1
|
||||
}, { x: 1 });
|
||||
}
|
||||
|
||||
/*
|
||||
* IFirebaseQuery.orderByChild()
|
||||
*/
|
||||
() => {
|
||||
// For example, using our sample Firebase of dinosaur facts,
|
||||
// we can read all dinosaurs ordered by height using the following query:
|
||||
var ref = new Firebase("https://dinosaur-facts.firebaseio.com/");
|
||||
ref.orderByChild("height").on("child_added", function (snapshot) {
|
||||
console.log(snapshot.key() + " was " + snapshot.val().height + " meters tall");
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* IFirebaseQuery.orderByKey()
|
||||
*/
|
||||
() => {
|
||||
// For example, using our sample Firebase of dinosaur facts,
|
||||
// we can read all dinosaurs in alphabetical order, ignoring their priority,
|
||||
// using the following query:
|
||||
var ref = new Firebase("https://dinosaur-facts.firebaseio.com/");
|
||||
ref.orderByKey().on("child_added", function (snapshot) {
|
||||
console.log(snapshot.key());
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* IFirebaseQuery.orderByPriority()
|
||||
*/
|
||||
() => {
|
||||
// For example, using our sample Firebase of dinosaur facts,
|
||||
// we can read all dinosaurs in priority order using the following query:
|
||||
var ref = new Firebase("https://dinosaur-facts.firebaseio.com/");
|
||||
ref.orderByPriority().on("child_added", function (snapshot) {
|
||||
console.log(snapshot.key());
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* IFirebaseQuery.startAt()
|
||||
*/
|
||||
() => {
|
||||
// For example, using our sample Firebase of dinosaur facts,
|
||||
// we can find all dinosaurs that are at least three meters tall
|
||||
// by combining orderByChild() and startAt():
|
||||
var ref = new Firebase("https://dinosaur-facts.firebaseio.com/");
|
||||
ref.orderByChild("height").startAt(3).on("child_added", function (snapshot) {
|
||||
console.log(snapshot.key())
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* IFirebaseQuery.endAt()
|
||||
*/
|
||||
() => {
|
||||
// For example, using our sample Firebase of dinosaur facts,
|
||||
// we can find all dinosaurs whose names come before Pterodactyl lexicographically
|
||||
// by combining orderByKey() and endAt():
|
||||
var ref = new Firebase("https://dinosaur-facts.firebaseio.com/");
|
||||
ref.orderByKey().endAt("pterodactyl").on("child_added", function (snapshot) {
|
||||
console.log(snapshot.key());
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* IFirebaseQuery.equalTo()
|
||||
*/
|
||||
() => {
|
||||
// For example, using our sample Firebase of dinosaur facts,
|
||||
// we can find all dinosaurs whose height is exactly 25 meters
|
||||
// by combining orderByChild() and equalTo():
|
||||
var ref = new Firebase("https://dinosaur-facts.firebaseio.com/");
|
||||
ref.orderByChild("height").equalTo(25).on("child_added", function (snapshot) {
|
||||
console.log(snapshot.key());
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* IFirebaseQuery.limitToFirst
|
||||
*/
|
||||
() => {
|
||||
// Using our sample Firebase of dinosaur facts,
|
||||
// we can find the two shortest dinosaurs with this query:
|
||||
var ref = new Firebase("https://dinosaur-facts.firebaseio.com/");
|
||||
ref.orderByChild("height").limitToFirst(2).on("child_added", function (snapshot) {
|
||||
console.log(snapshot.key());
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* IFirebaseQuery.limitToLast
|
||||
*/
|
||||
() => {
|
||||
// Using our sample Firebase of dinosaur facts,
|
||||
// we can find the two heaviest dinosaurs with this query:
|
||||
var ref = new Firebase("https://dinosaur-facts.firebaseio.com/");
|
||||
ref.orderByChild("weight").limitToLast(2).on("child_added", function (snapshot) {
|
||||
console.log(snapshot.key());
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* IFirebaseQuery.ref()
|
||||
*/
|
||||
() => {
|
||||
// The Firebase reference returned by ref() is equivalent to the Firebase reference used to create the Query.
|
||||
var ref = new Firebase("https://samplechat.firebaseio-demo.com/users");
|
||||
var query = ref.limitToFirst(5);
|
||||
var refToSameLocation = query.ref(); // ref === refToSameLocation
|
||||
}
|
||||
|
||||
/*
|
||||
* Firebase.onDisconnect().set()
|
||||
*/
|
||||
() => {
|
||||
var disconnectRef = new Firebase('https://samplechat.firebaseio-demo.com/disconnectmessage');
|
||||
disconnectRef.onDisconnect().set('I disconnected!');
|
||||
}
|
||||
|
||||
/*
|
||||
* Firebase.onDisconnect().update()
|
||||
*/
|
||||
() => {
|
||||
var disconnectRef = new Firebase('https://samplechat.firebaseio-demo.com/disconnectmessage');
|
||||
disconnectRef.onDisconnect().update({ message: 'I disconnected!' });
|
||||
}
|
||||
|
||||
/*
|
||||
* Firebase.onDisconnect().remove()
|
||||
*/
|
||||
() => {
|
||||
var disconnectRef = new Firebase('https://samplechat.firebaseio-demo.com/disconnectdata');
|
||||
disconnectRef.onDisconnect().remove();
|
||||
}
|
||||
|
||||
/*
|
||||
* Firebase.onDisconnect().setWithPriority()
|
||||
*/
|
||||
() => {
|
||||
var disconnectRef = new Firebase('https://samplechat.firebaseio-demo.com/disconnectMessage');
|
||||
disconnectRef.onDisconnect().setWithPriority('I disconnected', 10);
|
||||
}
|
||||
|
||||
/*
|
||||
* Firebase.onDisconnect().cancel()
|
||||
*/
|
||||
() => {
|
||||
var fredOnlineRef = new Firebase('https://samplechat.firebaseio-demo.com/users/fred/online');
|
||||
fredOnlineRef.onDisconnect().set(false);
|
||||
|
||||
// cancel the previously set onDisconnect().set() event
|
||||
fredOnlineRef.onDisconnect().cancel();
|
||||
}
|
||||
|
||||
/*
|
||||
* Firebase.ServerValue.TIMESTAMP
|
||||
*/
|
||||
() => {
|
||||
// Record the current time immediately, and queue an event to
|
||||
// record the time at which the user disconnects.
|
||||
var sessionsRef = new Firebase('https://samplechat.firebaseio-demo.com/sessions/');
|
||||
var mySessionRef = sessionsRef.push();
|
||||
mySessionRef.onDisconnect().update({ endedAt: Firebase.ServerValue.TIMESTAMP });
|
||||
mySessionRef.update({ startedAt: Firebase.ServerValue.TIMESTAMP });
|
||||
}
|
||||
|
||||
/*
|
||||
* DataSnapshot.val()
|
||||
*/
|
||||
() => {
|
||||
// Demonstrate writing data and then reading it back as a Javascript object.
|
||||
var fredNameRef = new Firebase('https://SampleChat.firebaseIO-demo.com/users/fred');
|
||||
fredNameRef.set({ first: 'Fred', last: 'Flintstone' });
|
||||
|
||||
fredNameRef.once('value', function (nameSnapshot) {
|
||||
var val = nameSnapshot.val();
|
||||
// val now contains the object { first: 'Fred', last: 'Flintstone' }.
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* DataSnapshot.child()
|
||||
*/
|
||||
(dataSnapshot:IFirebaseDataSnapshot) => {
|
||||
// Given a DataSnapshot containing a child 'name' that has children 'first'
|
||||
// (set to 'Fred') and 'last' (set to 'Flintstone'):
|
||||
var nameSnapshot = dataSnapshot.child('name');
|
||||
var name = nameSnapshot.val();
|
||||
// name now contains { first: 'Fred', last: 'Flintstone'}.
|
||||
|
||||
var firstNameSnapshot = dataSnapshot.child('name/first');
|
||||
var firstName = firstNameSnapshot.val();
|
||||
// firstName now contains 'Fred'.
|
||||
|
||||
var favoriteColorSnapshot = dataSnapshot.child('favorite_color');
|
||||
var favoriteColor = favoriteColorSnapshot.val();
|
||||
// favoriteColor will be null, because there is no 'favorite_color' child in dataSnapshot.
|
||||
}
|
||||
|
||||
/*
|
||||
* DataSnapshot.forEach()
|
||||
*/
|
||||
(dataSnapshot:IFirebaseDataSnapshot) => {
|
||||
// Given a DataSnapshot containing a child "fred" and a child "wilma", this callback
|
||||
// function will be called twice
|
||||
dataSnapshot.forEach(function (childSnapshot) {
|
||||
// key will be "fred" the first time and "wilma" the second time
|
||||
var key = childSnapshot.key();
|
||||
|
||||
// childData will be the actual contents of the child
|
||||
var childData = childSnapshot.val();
|
||||
});
|
||||
}
|
||||
(dataSnapshot:IFirebaseDataSnapshot) => {
|
||||
// Given a DataSnapshot containing a child "fred" and a child "wilma", this callback
|
||||
// funciton will only be called once (since we return true)
|
||||
dataSnapshot.forEach(function (childSnapshot) {
|
||||
var key = childSnapshot.key(); // key will be "fred"
|
||||
return true;
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* DataSnapshot.hasChild()
|
||||
*/
|
||||
(dataSnapshot: IFirebaseDataSnapshot) => {
|
||||
// Given a DataSnapshot with child 'fred' and no other children:
|
||||
var x = dataSnapshot.hasChild('fred');
|
||||
var y = dataSnapshot.hasChild('whales');
|
||||
// x is true and y is false.
|
||||
}
|
||||
|
||||
/*
|
||||
* DataSnapshot.hasChildren()
|
||||
*/
|
||||
(dataSnapshot: IFirebaseDataSnapshot) => {
|
||||
// Given a DataSnapshot containing a child 'name' with children 'first'
|
||||
// (set to 'Fred') and 'last' (set to 'Flintstone'):
|
||||
var x = dataSnapshot.hasChildren();
|
||||
// x is true.
|
||||
var y = dataSnapshot.child('name').hasChildren();
|
||||
// y is true.
|
||||
var z = dataSnapshot.child('name/first').hasChildren();
|
||||
// z is false since 'Fred' is a string and therefore has no children.
|
||||
}
|
||||
|
||||
/*
|
||||
* DataSnapshot.key()
|
||||
*/
|
||||
() => {
|
||||
// Calling key() on any DataSnapshot (except for one which represents the root of a Firebase)
|
||||
// will return the key name of the location that generated it:
|
||||
var fredRef = new Firebase("https://samplechat.firebaseio-demo.com/users/fred");
|
||||
fredRef.on("value", function (fredSnapshot) {
|
||||
var key = fredSnapshot.key(); // key === "fred"
|
||||
key = fredSnapshot.child("name/last").key(); // key === "last"
|
||||
});
|
||||
}
|
||||
() => {
|
||||
// Calling key() on a DataSnapshot generated from a reference to the root of a Firebase return null:
|
||||
var rootRef = new Firebase("https://samplechat.firebaseio-demo.com");
|
||||
rootRef.on("value", function (rootSnapshot) {
|
||||
var key = rootSnapshot.key(); // key === null
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* DataSnapshot.name()
|
||||
*/
|
||||
() => {
|
||||
var fredRef = new Firebase("https://samplechat.firebaseio-demo.com/users/fred");
|
||||
fredRef.on("value", function (fredSnapshot) {
|
||||
var key = fredSnapshot.name(); // key === "fred"
|
||||
key = fredSnapshot.child("name/last").name(); // key === "last"
|
||||
});
|
||||
}
|
||||
() => {
|
||||
var rootRef = new Firebase("https://samplechat.firebaseio-demo.com");
|
||||
rootRef.on("value", function (rootSnapshot) {
|
||||
var key = rootSnapshot.name(); // key === null
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* DataSnapshot.numChildren()
|
||||
*/
|
||||
(dataSnapshot: IFirebaseDataSnapshot) => {
|
||||
// Given a DataSnapshot containing a child 'name' with children 'first'
|
||||
// (set to 'Fred') and 'last' (set to 'Flintstone'):
|
||||
var x = dataSnapshot.numChildren();
|
||||
// x is 1.
|
||||
var y = dataSnapshot.child('name').numChildren();
|
||||
// y is 2.
|
||||
var z = dataSnapshot.child('name/first').numChildren();
|
||||
// z is 0 since 'Fred' is a string and therefore has no children.
|
||||
}
|
||||
|
||||
/*
|
||||
* DataSnaphot.ref()
|
||||
*/
|
||||
() => {
|
||||
var fredRef = new Firebase('https://samplechat.firebaseio-demo.com/users/fred');
|
||||
fredRef.on('value', function (fredSnapshot) {
|
||||
var fredRef2 = fredSnapshot.ref();
|
||||
// fredRef and fredRef2 both point to the same location.
|
||||
});
|
||||
}
|
||||
|
||||
/*
|
||||
* DataSnapshot.getPriority()
|
||||
*/
|
||||
(dataSnapshot: IFirebaseDataSnapshot) => {
|
||||
// Given a snapshot for data with priority 1000:
|
||||
var x = dataSnapshot.getPriority();
|
||||
// x is now 1000.
|
||||
}
|
||||
|
||||
/*
|
||||
* DataSnapshot.exportVal()
|
||||
*/
|
||||
(dataSnapshot: IFirebaseDataSnapshot) => {
|
||||
firebaseRef.setWithPriority('hello', 500);
|
||||
firebaseRef.once('value', function (dataSnapshot) {
|
||||
var x = dataSnapshot.exportVal();
|
||||
// x now contains { '.value': 'hello', '.priority': 500 }
|
||||
});
|
||||
}
|
||||
(dataSnapshot: IFirebaseDataSnapshot) => {
|
||||
firebaseRef.set('hello');
|
||||
firebaseRef.once('value', function (dataSnapshot) {
|
||||
var x = dataSnapshot.exportVal();
|
||||
// x now contains 'hello'
|
||||
});
|
||||
}
|
||||
(dataSnapshot: IFirebaseDataSnapshot) => {
|
||||
// Note: To access these variables in JavaScript, you can use x['.value'] and x['.priority'].
|
||||
firebaseRef.setWithPriority({ a: 'hello', b: 'hi' }, 500);
|
||||
firebaseRef.once('value', function (dataSnapshot) {
|
||||
var x = dataSnapshot.exportVal();
|
||||
// x now contains { 'a': 'hello', 'b': 'hi', '.priority': 500 }
|
||||
});
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user