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// assumes you add a timestamp field to each record (see Firebase.ServerValue.TIMESTAMP) | |
// pros: fast and done server-side (less bandwidth, faster response), simple | |
// cons: a few bytes on each record for the timestamp | |
var ref = new Firebase(...); | |
ref.orderByChild('timestamp').startAt(Date.now()).on('child_added', function(snapshot) { | |
console.log('new record', snap.key()); | |
}); |
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// The classic AJAX call - dispatch before the request, and after it comes back | |
function myThunkActionCreator(someValue) { | |
return (dispatch, getState) => { | |
dispatch({type : "REQUEST_STARTED"}); | |
myAjaxLib.post("/someEndpoint", {data : someValue}) | |
.then( | |
response => dispatch({type : "REQUEST_SUCCEEDED", payload : response}), | |
error => dispatch({type : "REQUEST_FAILED", error : error}) | |
); |
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type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>; | |
export function withAppContext< | |
P extends { appContext?: AppContextInterface }, | |
R = Omit<P, 'appContext'> | |
>( | |
Component: React.ComponentClass<P> | React.StatelessComponent<P> | |
): React.SFC<R> { | |
return function BoundComponent(props: R) { | |
return ( |
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window.scrollTo(0, 0) | |
var bodyRect = document.body.getBoundingClientRect(); | |
var items = Array.prototype.slice.call( | |
document.querySelectorAll('*') | |
).map(function(element) { | |
var rect=element.getBoundingClientRect(); | |
return { | |
element: element, | |
include: (element.tagName === "BUTTON" || element.tagName === "A" || (element.onclick != null) || window.getComputedStyle(element).cursor == "pointer"), |