hosted database. Data is stored as JSON and synchronized in realtime to every connected client. When you build cross-platform apps with Firebase iOS, Android, and JavaScript SDKs, all of your clients share one Realtime Database instance and automatically receive updates with the newest data. Firebase Realtime Database
rich, collaborative applications by allowing secure access to the database directly from client-side code. Data is persisted locally, and even while o ine, realtime events continue to re, giving the end user a responsive experience. When the device regains connection, the Realtime Database synchronizes the local data changes with the remote updates that occurred while the client was o ine, merging any con icts automatically. The Realtime Database provides a exible, expression-based rules language, called Firebase Realtime Database Security Rules, to de ne how your data should be structured and when data can be read from or written to. When integrated with Firebase Authentication, developers can de ne who has access to what data, and how they can access it. Ref: Firebase Realtime Database The Realtime Database is a NoSQL database and as such has di erent optimizations and functionality compared to a relational database. The Realtime Database API is designed to only allow operations that can be executed quickly. This enables you to build a great realtime experience that can serve millions of users without compromising on responsiveness. Because of this, it is important to think about how users need to access your data and then structure it accordingly.
o n p m i n s t a l l - g f i r e b a s e - t o o l s $ g i t c l o n e h t t p s : / / g i t h u b . c o m / f i r e b a s e / q u i c k s t a r t - j s . g i t $ c d q u i c k s t a r t - j s / d a t a b a s e q u i c k s t a r t - j s / d a t a b a s e $ t r e e . | - - f i r e b a s e . j s o n | - - f i r e b a s e - l o g o . p n g | - - i n d e x . h t m l | - - m a i n . c s s | - - p i c s | | - - e n a b l e . p n g | | - - r e d c i r c l e . p n g | | - - s n i p p e t . p n g | - - R E A D M E . m d | - - s c r i p t s | | - - m a i n . j s | - - s i l h o u e t t e . j p g q u i c k s t a r t - j s / d a t a b a s e $ f i r e b a s e s e r v e - o 0 . 0 . 0 . 0 S t a r t i n g F i r e b a s e d e v e l o p m e n t s e r v e r . . . P r o j e c t D i r e c t o r y : / h o m e / e m / f b a s e d i r / q u i c k s t a r t - j s / d a t a b a s e P u b l i c D i r e c t o r y : . / S e r v e r l i s t e n i n g a t : h t t p : / / 0 . 0 . 0 . 0 : 5 0 0 0
s e - - > < s c r i p t s r c = " h t t p s : / / w w w . g s t a t i c . c o m / f i r e b a s e j s / 3 . 6 . 4 / f i r e b a s e . j s " > < / s c r i p t > < s c r i p t > v a r c o n f i g = { a p i K e y : " A I z a S y C y z w 3 n f Q v y r 3 8 Y h 1 2 7 R P y _ 1 2 3 4 5 _ a H e f U " , a u t h D o m a i n : " f b a s e - t e s t - 5 4 a 6 2 . f i r e b a s e a p p . c o m " , d a t a b a s e U R L : " h t t p s : / / f b a s e - t e s t - 5 4 a 6 2 . f i r e b a s e i o . c o m " , s t o r a g e B u c k e t : " f b a s e - t e s t - 5 4 a 6 2 . a p p s p o t . c o m " , m e s s a g i n g S e n d e r I d : " 9 8 9 4 0 8 9 8 3 1 2 3 " } ; f i r e b a s e . i n i t i a l i z e A p p ( c o n f i g ) ; < / s c r i p t > < / h e a d > < b o d y > < d i v c l a s s = " d e m o - l a y o u t m d l - l a y o u t m d l - j s - l a y o u t m d l - l a y o u t - - f i x e d - h e a d e r " > < ! - - S p l a s h s c r e e n - - > < s e c t i o n i d = " p a g e - s p l a s h " > < h 3 c l a s s = " l o g o " > D a t a b a s e W e b Q u i c k s t a r t < / h 3 > < d i v > < b u t t o n i d = " s i g n - i n - b u t t o n " c l a s s = " m d l - b u t t o n - - r a i s e d m d l - b u t t o n m d l - j s - b u t t o n m d l - j s - r i p p l e - e f f e c t " < / d i v > < / s e c t i o n > < ! - - H e a d e r s e c t i o n c o n t a i n i n g l o g o a n d m e n u - - > < h e a d e r c l a s s = " h e a d e r m d l - l a y o u t _ _ h e a d e r m d l - c o l o r - t e x t - - w h i t e m d l - c o l o r - - l i g h t - b l u e - 7 0 0 " > < d i v c l a s s = " m d l - l a y o u t _ _ h e a d e r - r o w t i t l e b a r " > < h 3 c l a s s = " l o g o " > D a t a b a s e W e b Q u i c k s t a r t < / h 3 > < b u t t o n i d = " s i g n - o u t - b u t t o n " c l a s s = " m d l - b u t t o n - - r a i s e d m d l - b u t t o n m d l - j s - b u t t o n m d l - j s - r i p p l e - e f f e c t " < / d i v > < ! - - N a v i g a t i o n B a r - - > < d i v c l a s s = " t a b m d l - l a y o u t _ _ h e a d e r - r o w m d l - c o l o r - - l i g h t - b l u e - 6 0 0 " > < d i v c l a s s = " m d l - t a b " > < d i v i d = " m e n u - r e c e n t " c l a s s = " m d l - l a y o u t _ _ t a b i s - a c t i v e m d l - b u t t o n m d l - j s - b u t t o n m d l - j s - r i p p l e - e f f e c t " < i c l a s s = " m a t e r i a l - i c o n s " > n e w _ r e l e a s e s < / i > R e c e n t < / d i v > < d i v i d = " m e n u - m y - p o s t s " c l a s s = " m d l - l a y o u t _ _ t a b m d l - b u t t o n m d l - j s - b u t t o n m d l - j s - r i p p l e - e f f e c t " < i c l a s s = " m a t e r i a l - i c o n s " > h o m e < / i > M y p o s t s < / d i v > < d i v i d = " m e n u - m y - t o p - p o s t s " c l a s s = " m d l - l a y o u t _ _ t a b m d l - b u t t o n m d l - j s - b u t t o n m d l - j s - r i p p l e - e f f e c t " 22 / 37 index.html
f t : 5 0 p x ; b a c k g r o u n d - p o s i t i o n - y : - 2 p x ; } . m d l - t e x t f i e l d { w i d t h : 1 0 0 % ; } / * F i x e s a n M D L b u g w h e r e t h e h e a d e r d o e s n o t s c r o l l o n s m a l l d e v i c e s * / . m d l - l a y o u t _ _ c o n t a i n e r . m d l - l a y o u t - - f i x e d - h e a d e r . m d l - l a y o u t _ _ c o n t e n t { o v e r f l o w - y : v i s i b l e ; o v e r f l o w - x : v i s i b l e ; o v e r f l o w : v i s i b l e ; } / * O v e r r i d e s M D L c o l o r s * / . m d l - l a y o u t . i s - u p g r a d e d . m d l - l a y o u t _ _ t a b . i s - a c t i v e : : a f t e r , . h e a d e r . m d l - t e x t f i e l d _ _ l a b e l : a f t e r { b a c k g r o u n d - c o l o r : # F F C A 2 8 ; } . m d l - s n a c k b a r _ _ a c t i o n { c o l o r : # F F C A 2 8 ; } . m d l - t e x t f i e l d _ _ l a b e l : a f t e r { b a c k g r o u n d - c o l o r : # 0 2 8 8 D 1 ; } . m d l - t e x t f i e l d - - f l o a t i n g - l a b e l . i s - f o c u s e d . m d l - t e x t f i e l d _ _ l a b e l { c o l o r : # 0 2 8 8 D 1 ; } / * H e a d e r * / . l o g o { f o n t - f a m i l y : ' A m a r a n t h ' , s a n s - s e r i f ; } . l o g o . m a t e r i a l - i c o n s { t o p : 4 p x ; f o n t - s i z e : 3 2 p x ; m a r g i n - r i g h t : - 2 p x ; p o s i t i o n : r e l a t i v e ; } . h e a d e r . m d l - l a y o u t _ _ h e a d e r - r o w { m a x - w i d t h : 1 0 2 4 p x ; w i d t h : 1 0 0 % ; h e i g h t : a u t o ; 23 / 37 main.css
a y s t h e g i v e n s e c t i o n e l e m e n t a n d c h a n g e s s t y l i n g o f t h e g i v e n b u t t o n . * / f u n c t i o n s h o w S e c t i o n ( s e c t i o n E l e m e n t , b u t t o n E l e m e n t ) { r e c e n t P o s t s S e c t i o n . s t y l e . d i s p l a y = ' n o n e ' ; u s e r P o s t s S e c t i o n . s t y l e . d i s p l a y = ' n o n e ' ; t o p U s e r P o s t s S e c t i o n . s t y l e . d i s p l a y = ' n o n e ' ; a d d P o s t . s t y l e . d i s p l a y = ' n o n e ' ; r e c e n t M e n u B u t t o n . c l a s s L i s t . r e m o v e ( ' i s - a c t i v e ' ) ; m y P o s t s M e n u B u t t o n . c l a s s L i s t . r e m o v e ( ' i s - a c t i v e ' ) ; m y T o p P o s t s M e n u B u t t o n . c l a s s L i s t . r e m o v e ( ' i s - a c t i v e ' ) ; i f ( s e c t i o n E l e m e n t ) { s e c t i o n E l e m e n t . s t y l e . d i s p l a y = ' b l o c k ' ; } i f ( b u t t o n E l e m e n t ) { b u t t o n E l e m e n t . c l a s s L i s t . a d d ( ' i s - a c t i v e ' ) ; } } / / B i n d i n g s o n l o a d . w i n d o w . a d d E v e n t L i s t e n e r ( ' l o a d ' , f u n c t i o n ( ) { / / B i n d S i g n i n b u t t o n . s i g n I n B u t t o n . a d d E v e n t L i s t e n e r ( ' c l i c k ' , f u n c t i o n ( ) { v a r p r o v i d e r = n e w f i r e b a s e . a u t h . G o o g l e A u t h P r o v i d e r ( ) ; f i r e b a s e . a u t h ( ) . s i g n I n W i t h P o p u p ( p r o v i d e r ) ; } ) ; / / B i n d S i g n o u t b u t t o n . s i g n O u t B u t t o n . a d d E v e n t L i s t e n e r ( ' c l i c k ' , f u n c t i o n ( ) { f i r e b a s e . a u t h ( ) . s i g n O u t ( ) ; } ) ; / / L i s t e n f o r a u t h s t a t e c h a n g e s f i r e b a s e . a u t h ( ) . o n A u t h S t a t e C h a n g e d ( o n A u t h S t a t e C h a n g e d ) ; / / S a v e s m e s s a g e o n f o r m s u b m i t . m e s s a g e F o r m . o n s u b m i t = f u n c t i o n ( e ) { e . p r e v e n t D e f a u l t ( ) ; v a r t e x t = m e s s a g e I n p u t . v a l u e ; v a r t i t l e = t i t l e I n p u t . v a l u e ; i f ( t e x t & & t i t l e ) { 24 / 37 main.js
m e n t s " : { " - K _ B C o Y Q A F T - C W q l r S o i " : { " - K _ B C y L L z Z Z N _ u z k v 8 u 3 " : { " a u t h o r " : " E u e u n g M u l y a n a " , " t e x t " : " t e s t c o m m e n t " , " u i d " : " N x x n V o X 2 O f V A G a G E b 5 2 q L e H j Q v p 1 " } } } , " p o s t s " : { " - K _ B C o Y Q A F T - C W q l r S o i " : { " a u t h o r " : " E u e u n g M u l y a n a " , " a u t h o r P i c " : " h t t p s : / / l h 3 . g o o g l e u s e r c o n t e n t . c o m / - l 7 T j 7 J p d X V o / A A A A A A A A A A I / A A A A A A A A B x 8 / E H b A G O h a g - A / p h o t o . j p g " " b o d y " : " i n i b u d i . i n i w a t i . w a t i k a k a k n y a b u d i . " , " s t a r C o u n t " : 0 , " t i t l e " : " I n t e r s t e l l a r S p a c e " , " u i d " : " N x x n V o X 2 O f V A G a G E b 5 2 q L e H j Q v p 1 " } , " - K _ B D 4 f 8 R P z b 1 d m q 6 F H b " : { " a u t h o r " : " E u e u n g M u l y a n a " , " a u t h o r P i c " : " h t t p s : / / l h 3 . g o o g l e u s e r c o n t e n t . c o m / - l 7 T j 7 J p d X V o / A A A A A A A A A A I / A A A A A A A A B x 8 / E H b A G O h a g - A / p h o t o . j p g " " b o d y " : " u n y i l u n c r i t u s r o n d u t c u p l i s \ n " , " s t a r C o u n t " : 0 , " t i t l e " : " A n o t h e r p o s t " , " u i d " : " N x x n V o X 2 O f V A G a G E b 5 2 q L e H j Q v p 1 " } } , " u s e r - p o s t s " : { " N x x n V o X 2 O f V A G a G E b 5 2 q L e H j Q v p 1 " : { " - K _ B C o Y Q A F T - C W q l r S o i " : { " a u t h o r " : " E u e u n g M u l y a n a " , " a u t h o r P i c " : " h t t p s : / / l h 3 . g o o g l e u s e r c o n t e n t . c o m / - l 7 T j 7 J p d X V o / A A A A A A A A A A I / A A A A A A A A B x 8 / E H b A G O h a g - A / p h o t o . j p g " " b o d y " : " i n i b u d i . i n i w a t i . w a t i k a k a k n y a b u d i . " , " s t a r C o u n t " : 0 , " t i t l e " : " I n t e r s t e l l a r S p a c e " , " u i d " : " N x x n V o X 2 O f V A G a G E b 5 2 q L e H j Q v p 1 " } , " - K _ B D 4 f 8 R P z b 1 d m q 6 F H b " : { " a u t h o r " : " E u e u n g M u l y a n a " , " a u t h o r P i c " : " h t t p s : / / l h 3 . g o o g l e u s e r c o n t e n t . c o m / - l 7 T j 7 J p d X V o / A A A A A A A A A A I / A A A A A A A A B x 8 / E H b A G O h a g - A / p h o t o . j p g " 25 / 37 JSON Export
" - K _ E G c q w p c g G T z i R o d q c " : { " t e x t " : " t o d o 1 : j a m b u p a k r a d e n " } , " - K _ E G w q _ W t L X l z 8 u L d J 2 " : { " t e x t " : " t o d o 2 : r u j a k b u b a r i y a h " } , " - K _ E H H e 3 z b G b 0 a i X y F 4 K " : { " t e x t " : " t o d o 3 : k e l e r e n g s i u n y i l " } } } # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - # F o r C o m p a r i s o n , P r e v i o u s l y E q u i v a l e n t : { " t o d o s " : [ { " t e x t " : " t o d o 1 : j a m b u p a k r a d e n " } , { " t e x t " : " t o d o 2 : r u j a k b u b a r i y a h " } , { " t e x t " : " t o d o 3 : k e l e r e n g s i u n y i l " } ] } 29 / 37 JSON Export
= " h t t p s : / / w w w . g s t a t i c . c o m / f i r e b a s e j s / 3 . 6 . 4 / f i r e b a s e . j s " > < / s c r i p t > < / h e a d > < b o d y > < d i v i d = " a p p " > < m d - t o o l b a r > < h 1 c l a s s = " m d - t i t l e " > L e a r n i n g V u e . J S < / h 1 > < / m d - t o o l b a r > < d i v c l a s s = " m a i n - c o n t e n t " > < m d - i n p u t - c o n t a i n e r > < l a b e l > E n t e r T o d o < / l a b e l > < m d - i n p u t v - m o d e l = " n e w T o d o " > < / m d - i n p u t > < / m d - i n p u t - c o n t a i n e r > < m d - b u t t o n c l a s s = " m d - r a i s e d m d - p r i m a r y " v - o n : c l i c k = " a d d T o d o " > A d d T o d o < / m d - b u t t o n > < u l > < l i v - f o r = " t o d o i n t o d o s " > < m d - b u t t o n c l a s s = " m d - i c o n - b u t t o n m d - w a r n " v - o n : c l i c k = " r e m o v e T o d o ( t o d o ) " > < m d - i c o n > r e m o v e _ c i r c l e _ o u t l i n e { { t o d o . t e x t } } < / l i > < / u l > < / d i v > < / d i v > < s c r i p t s r c = " / / u n p k g . c o m / v u e / d i s t / v u e . j s " > < / s c r i p t > < s c r i p t s r c = " / / u n p k g . c o m / v u e f i r e / d i s t / v u e f i r e . j s " > < / s c r i p t > < s c r i p t s r c = " / / u n p k g . c o m / v u e - m a t e r i a l @ l a t e s t " > < / s c r i p t > < s c r i p t t y p e = " t e x t / j a v a s c r i p t " > V u e . u s e ( V u e M a t e r i a l ) ; V u e . u s e ( V u e F i r e ) ; v a r c o n f i g = { a p i K e y : " A I z a S y C 8 T M 4 2 d W Y F 1 2 3 _ 1 2 3 4 5 g v M P v Y H d t E M W M c " , a u t h D o m a i n : " f b a s e - v u e . f i r e b a s e a p p . c o m " , d a t a b a s e U R L : " h t t p s : / / f b a s e - v u e . f i r e b a s e i o . c o m " } ; f i r e b a s e . i n i t i a l i z e A p p ( c o n f i g ) ; v a r t o d o s R e f = f i r e b a s e . d a t a b a s e ( ) . r e f ( ' t o d o s ' ) ; v a r A p p = n e w V u e ( { e l : ' # a p p ' , 30 / 37 Code
p " > < m d - t o o l b a r > < h 1 c l a s s = " m d - t i t l e " > L e a r n i n g V u e . J S < / h 1 > < / m d - t o o l b a r > < d i v c l a s s = " m a i n - c o n t e n t " > < m d - i n p u t - c o n t a i n e r > < l a b e l > U s e r n a m e < / l a b e l > < m d - i n p u t t y p e = " t e x t " v - m o d e l = " n e w U s e r . n a m e " p l a c e h o l d e r = " U s e r n a m e " > < / m d - i n p u t > < / m d - i n p u t - c o n t a i n e r > < m d - i n p u t - c o n t a i n e r > < l a b e l > E m a i l < / l a b e l > < m d - i n p u t t y p e = " e m a i l " v - m o d e l = " n e w U s e r . e m a i l " p l a c e h o l d e r = " e m a i l @ e m a i l . c o m " > < / m d - i n p u t > < / m d - i n p u t - c o n t a i n e r > < m d - b u t t o n c l a s s = " m d - r a i s e d m d - p r i m a r y " v - o n : c l i c k = " a d d U s e r " > A d d U s e r < / m d - b u t t o n > < u l c l a s s = " e r r o r s " > < l i v - s h o w = " ! v a l i d a t i o n . n a m e " > N a m e c a n n o t b e e m p t y . < / l i > < l i v - s h o w = " ! v a l i d a t i o n . e m a i l " > P l e a s e p r o v i d e a v a l i d e m a i l a d d r e s s . < / l i > < / u l > < u l i s = " t r a n s i t i o n - g r o u p " > < l i v - f o r = " u s e r i n u s e r s " c l a s s = " u s e r " : k e y = " u s e r [ ' . k e y ' ] " > < m d - b u t t o n c l a s s = " m d - i c o n - b u t t o n m d - w a r n " v - o n : c l i c k = " r e m o v e U s e r ( u s e r ) " > < m d - i c o n > r e m o v e _ c i r c l e _ o u t l i n e < s p a n > { { u s e r . n a m e } } - { { u s e r . e m a i l } } < / s p a n > < / l i > < / u l > < / d i v > < / d i v > < s c r i p t s r c = " / / u n p k g . c o m / v u e / d i s t / v u e . j s " > < / s c r i p t > < s c r i p t s r c = " / / u n p k g . c o m / v u e f i r e / d i s t / v u e f i r e . j s " > < / s c r i p t > < s c r i p t s r c = " / / u n p k g . c o m / v u e - m a t e r i a l @ l a t e s t " > < / s c r i p t > < s c r i p t t y p e = " t e x t / j a v a s c r i p t " > V u e . u s e ( V u e M a t e r i a l ) ; V u e . u s e ( V u e F i r e ) ; v a r e m a i l R E = / ^ ( ( [ ^ < > ( ) [ \ ] \ \ . , ; : \ s @ \ " ] + ( \ . [ ^ < > ( ) [ \ ] \ \ . , ; : \ s @ \ " ] + ) * ) | ( \ " . + \ " ) ) @ ( ( \ [ [ 0 - 9 ] { 1 , 3 } \ . [ 0 - 9 ] { 1 , 3 } \ . [ 0 - 9 ] { 1 , 3 } \ . [ 0 - 9 ] { 1 , 3 } \ ] ) | ( ( [ a - z A - v a r c o n f i g = { a p i K e y : " A I z a S y C 8 T M 4 2 d W Y F 1 2 3 _ 1 2 3 4 5 g v M P v Y H d t E M W M c " , a u t h D o m a i n : " f b a s e - v u e . f i r e b a s e a p p . c o m " , 34 / 37 Code
eueung
moriyuya
tomoyks
_kensh
personabb
kairim0
soudai
shinyasaita
lycorptech_jp
otanet
nyankotaro
miyatakoji
ham0215
jonrohan
palkan
livdayseo
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lfama
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rkendrick25
