Rendering iFrame in React - reactjs

I have a parent component with two buttons. Button 1 should open iFrame with url 1 and button 2 url 2. It seems the way I built it the iFrame is not rebuilt entirely.
parent.js
if (currentTable.id === "Bo3Ko3K") {
<DailyCo url="https://meeting.daily.co/123456" />
} else if (currentTable.id === "9RGmWxX") {
<DailyCo url="https://meeting.daily.co/abcdef" />
}
child.js
import { makeStyles } from "#material-ui/core/styles";
import React, { useRef, useEffect } from "react";
import DailyIframe from "#daily-co/daily-js";
const useStyles = makeStyles((theme) => ({
root: {
width: "100%",
height: "100vh",
border: "0",
},
}));
const DailyCo = ({ url }) => {
const classes = useStyles();
const iframeRef = useRef();
useEffect(() => {
if (!url) {
console.error("please set an url!");
return;
}
const daily = DailyIframe.wrap(iframeRef.current, {
// showLeaveButton: true,
});
daily.join({ url });
}, [url]);
return (
<iframe
className={classes.root}
title="video call iframe"
ref={iframeRef}
allow="camera; microphone; fullscreen"
></iframe>
);
};
export default DailyCo;

You have 2 options I can see to get this working:
You need to leave the meeting before joining a new one. Unfortunately this method is complicated by daily taking about 7ms (in an async manner) to leave a meeting. So, it isn't possible to just have the useEffect clean up normally. It's also fun because daily.leave() returns a promise that never resolves if you aren't in a meeting. Their documentation for leave() is currently misleading:
Leaves the meeting. If there is no meeting, this method does nothing.
Returns null;
https://codesandbox.io/s/reverent-grass-qpjke?file=/src/App.js
const iframeRef = useRef();
const dailyRef = useRef();
const joinedRef = useRef();
useEffect(() => {
dailyRef.current = DailyIframe.wrap(iframeRef.current, {
// showLeaveButton: true,
});
dailyRef.current.on('left-meeting',()=>{
joinedRef.current=false;
})
dailyRef.current.on('joining-meeting',()=>{
joinedRef.current=true
})
console.log("mounted");
return () => {
dailyRef.current.destroy();
console.log("unmount");
};
}, []);
useEffect(() => {
(async () => {
if (joinedRef.current) {
// This is needed due to it never returning
// if there wasn't a meeting joined first...
await dailyRef.current.leave();
}
if (!url) {
console.error("please set an url!");
return;
}
await dailyRef.current.join({ url });
})();
}, [url]);
You need to call daily.destroy() before creating a new Wrap, otherwise they interfere with each other and issues abound and the new one never fully sets up. This issue is described in their documentation for destroy
You can re-use the daily-js call iframe or call object multiple times
(a sequence of join(), leave(), join(), etc method calls will work
fine).
But when you are finished with the daily-js call object, you should
call destroy() to free all resources associated with it.
This is particularly important if you plan to create another daily-js
object in the future. If you don't call destroy(), and later create a
new daily-js call object, the event listeners from the old object and
the new object will interfere with one another.
https://codesandbox.io/s/spring-water-nv3k3?file=/src/App.js
const iframeRef = useRef(null);
useEffect(() => {
if (!url) {
console.error("please set an url!");
return;
}
const daily = DailyIframe.wrap(iframeRef.current, {
// showLeaveButton: true,
});
daily.join({ url });
return () => {
daily.destroy();
};
}, [url]);
In general, I'd recommend to use option 1 if only because it's more performant (less set up and time required to change meetings). Even though it's easier to just destroy the wrap and recreate it.

Related

Refetching queries does not work - React Query

I'm trying to refetch some queries after one success but it's not working!
I used two ways to handle it by using refetchQueries() / invalidateQueries()
1- onSuccess callback
export const useMutateAcceptedOrder = () => {
const queryClient = useQueryClient();
return useMutation(
['AcceptedOrder'],
(bodyQuery: AcceptedOrderProps) => acceptOrder(bodyQuery),
{
onSuccess: () => {
console.log('success, refetch now!');
queryClient.invalidateQueries(['getNewOrders']); // not work
queryClient.refetchQueries(['getNewOrders']); // not work
},
onError: () => {
console.error('err');
queryClient.invalidateQueries(['getNewOrders']); // not work
},
},
);
};
second way
const {mutateAsync: onAcceptOrder, isLoading} = useMutateAcceptedOrder();
const acceptOrder = async (orderId: string) => {
const body = {
device: 'iPhone',
version: '1.0.0',
location_lat: '10.10',
location_lng: '10.10',
orderId: orderId,
os: Platform.OS,
source: 'mobile',
token: userInfo.token,
};
await onAcceptOrder(body);
queryClient.refetchQueries(['getNewOrders']); // not work
queryClient.invalidateQueries(['getActiveOrders']); // not work
handleClosetModalPress();
};
sample of query I wanted to refetch after the success
export const useNewOrders = (bodyQuery: {token: string | null}) => {
console.log('token>>', bodyQuery.token);
return useQuery(['getNewOrders'], () => getNewOrders(bodyQuery),
{
enabled: bodyQuery.token != null,
});
};
App.tsx
const App: React.FC<AppProps> = ({}) => {
const queryClient = new QueryClient();
if (__DEV__) {
import('react-query-native-devtools').then(({addPlugin}) => {
console.log('addPlugin');
addPlugin({queryClient});
});
}
useEffect(() => {
RNBootSplash.hide({fade: true}); // fade
}, []);
return (
<GestureHandlerRootView style={{flex: 1}}>
<QueryClientProvider client={queryClient}>
<BottomSheetModalProvider>
<AppContainer />
</BottomSheetModalProvider>
</QueryClientProvider>
</GestureHandlerRootView>
);
};
export default App;
--
EDIT
So after using the react-query-native-devtools Debug tool, I can't see any query in the first tab recorded in the debugger! Although the data fetched well.
So I guess that's why the refetch did not work in this case!
Any query in the first tab I can't refetch it again
Steps to reproduce:
open App - Active Tab (first tab)
check the status of the queries
nothing recorded in the debugger
Navigate to any other screen/tab
Check the status of queries
all screen queries recorded in the debugger
Per https://tkdodo.eu/blog/react-query-fa-qs#2-the-queryclient-is-not-stable:
If you move the client creation into the App component, and your component re-renders for some other reason (e.g. a route change), your cache will be thrown away:
Need to init queryClient like that:
const [queryClient] = React.useState(() => new QueryClient())
I was facing the same issue and haven't been able to find a proper solution for this, however I have found a hacky workaround. You just call your refetch function or invalidate queries inside a setTimeout.

React useState is not updating when set method is called in an interval

I have a websocket server that sends an object containing some hashes every 15 seconds. When the client receives a hash, I want to check with my current hash. If they differ, I want to make a call to an API to fetch new data.
The socket is working and sending the hash correctly. If the data updates on the server I get a different hash. My problem is that the hash variable I use to store the current hash is not updated correctly.
I have disabled the socket listening in my component, just to make sure that that is not the problem. Instead I have added a setInterval to mimik the socket update.
This is my code (socked code disabled but left as a comment):
import { useCallback, useEffect, useState } from "react";
import { useAuth, useSocket } from "../utils/hooks";
const Admin = () => {
const [ questionLists, setQuestionLists ] = useState<QuestionListModel[]>([]);
const { user } = useAuth();
const { socket } = useSocket();
const [ hash, setHash ] = useState<Hash>({questionList: ""});
const fetchHash = useCallback(async () => {
setHash({questionList: "sdhfubvwuedfhvfeuvyqhwvfeuq"});
}, []);
const fetchQuestionLists = useCallback(async () => {
console.log("fetching new question lists");
const response: ApiResponse | boolean = await getQuestionLists(user?.token);
if (typeof response !== "boolean" && response.data) {
setQuestionLists(response.data);
}
}, [hash]);
useEffect(() => {
fetchHash();
fetchQuestionLists();
}, []);
const update = useCallback((newHash: Hash) => {
console.log("called update");
let shouldUpdate = false;
let originalHash = { ...hash };
let updatedHash = { ...newHash };
console.log("new: ", newHash);
console.log("stored: ", originalHash);
if (hash.questionList !== newHash.questionList) {
console.log("was not equal");
updatedHash = { ...updatedHash, questionList: newHash.questionList}
shouldUpdate = true;
}
if (shouldUpdate) {
console.log("trying to set new hash: ", updatedHash);
setHash(updatedHash);
fetchQuestionLists();
}
}, [hash]);
/*useEffect(() => {
socket?.on('aHash', (fetchedHash) => update(fetchedHash));
}, []);*/
useEffect(() => {
setInterval(() => {
update({questionList: "sdhfubvwuedfhvfeuvyqhwvfeuq"});
}, 15000)
}, []);
return (
<>
... Things here later ...
</>
);
};
export default Admin;
After the initial render, and waiting two interval cycles, this is what I see in the console:
fetching new question lists
called update
new: {questionList: 'sdhfubvwuedfhvfeuvyqhwvfeuq'}
stored: {questionList: ''}
was not equal
trying to set new hash: {questionList: 'sdhfubvwuedfhvfeuvyqhwvfeuq'}
fetching new question lists
called update
new: {questionList: 'sdhfubvwuedfhvfeuvyqhwvfeuq'}
stored: {questionList: ''}
was not equal
trying to set new hash: {questionList: 'sdhfubvwuedfhvfeuvyqhwvfeuq'}
fetching new question lists
You can see that stored is empty. That leads me to believe that setHash(updatedHash); never runs for some reason. Why is that?
Having hacked about with this in codepen here: https://codesandbox.io/s/as-prop-base-forked-l3ncvo?file=/src/Application.tsx
This seems to me to be a closure issue as opposed to a React issue. If you have a look in the dev tools, you'll see the state of the component is doing what you're expecting it to. The issue is that the console log is not.
useEffect is only ever going to use an old version of update, so the console won't log what you're expecting. If you add update to the dependency array (and add a clean up so we don't end up with tonnes of intervals) you'll get what you're looking for. Can be seen in the linked codepen.
I think the issue in on this line :
socket?.on('aHash', (hash) => update(hash));
maybe when you register a listener, it keeps the first value of update only,
can you please share useSocket?
const [ hash, setHash ] = useState<Hash>({questionList: ""});
const fetchHash = useCallback(async () => {
setHash({questionList: "sdhfubvwuedfhvfeuvyqhwvfeuq"});
}, []);
Include setHash in your dependency list et voilĂ 
EDIT: Or well, you should include these dependencies in all your useCallback/useEffect hooks since the reference will be lost whenever the component updates. You always have to include all dependencies in the dependency list not to get unpredictable behavior.
use setState(prevValue => {}) to get the the preferred effect. Also, if you running in a Strict mode this will fire the setState twice.
Here is how the code should look like:
import { useCallback, useEffect, useState } from "react";
import { faker } from '#faker-js/faker';
const Admin = () => {
const [ questionLists, setQuestionLists ] = useState([]);
const [ hash, setHash ] = useState({questionList: ""});
const fetchHash = useCallback(async () => {
setHash({questionList: "sdhfubvwuedfhvfeuvyqhwvfeuq"});
}, []);
const fetchQuestionLists = useCallback(async () => {
console.log("fetching new question lists");
const response = {data: {hash: 'asdf-1234'}}
setQuestionLists(response.data);
}, [hash]);
useEffect(() => {
fetchHash();
fetchQuestionLists();
}, []);
const update = (newHash) => {
console.log("called update");
setHash(oldHash => {
console.log('old hash: ', oldHash);
console.log('new hash', newHash);
if (JSON.stringify(oldHash) !== JSON.stringify(newHash)) {
return newHash
}
})
};
/*useEffect(() => {
socket?.on('aHash', (fetchedHash) => update(fetchedHash));
}, []);*/
useEffect(() => {
setInterval(() => {
update({questionList: faker.random.numeric(36)});
}, 15000)
}, []);
return (
<>
<h2>Hash</h2>
{JSON.stringify(hash)}
</>
);
};
export default Admin;
In both cases (socket & interval) the issue is that you need to re-define the callback functions with the new context of the variables in the scope, whenever something changes. In this case you will probably need to put "update" (and whatever other variable you need to "watch") inside the dependancy array of the useEffect.
Ive had a similar issues. Here is how I ended up defining socket callback that updates correctly. Notice that I added the save function (just a function that saves the state into the useState). Also, you need to return a clean up function to turn the socket callback off when the component unmounts. This way every time anything changes in the dependancy array, the hook re-runs and recreates that callback with the new information.
React.useEffect(() => {
socketRef?.current?.on(
'private_message_sent_to_client',
(data: IMessageResult) => {
savePrivateMessages(data);
}
);
return () => {
socketRef?.current?.off('private_message_sent_to_client');
};
}, [meta, selectedChatId, savePrivateMessages]);
And here is an example for you
React.useEffect(() => {
socket?.on('aHash', (hash) => update(hash));
return () => {
socket?.off('aHash')
};
}, [update, hash]);

Memory leak when a iframe with url pointing to a react app is removed and added

I have a react-redux app which runs inside iframe, Iframe with same exact url is getting removed and added back by the parent application but doing so is causing memory footprint and CPU usage growing as we keep doing more number of times (reaches 5 GB after trying around 100 times), I believe it may not be something related to just react but in general as well, any help would be much appreciated.
React App in iframe:
const postMessage = () => {
window.parent.postMessage(JSON.stringify({ type: "TYPEB", message: "some message to parent" }), location.origin);
}
const messageEventHandler = (event) => {
//event handling code
}
const addMessageEventListenerFromParent = () => {
window.addEventListener("message", messageEventHandler);
};
const rootComponent = () =>
useEffect(() => {
// adding event listeners
addMessageEventListenerFromParent();
postMessage();
return () => {
console.log("unmounting the app");
removeMessageEventListenerFromParent();
};
}, []);
}
Parent App (React app):
const Iframe = (props) => {
const iframeRef = useRef(null);
const postMessage = (message) => {
if (iframeEl?.current.contentWindow?.postMessage) {
iframeEl.current.contentWindow.postMessage(message, location.origin);
}
};
useEffect(() => {
postMessage({
type: "TYPEA",
payload: somePayload,
})
}, [props.propA])
const memoizedIframe = useMemo(() => (
<iframe ref= { iframeRef } key = { key } className = "iframetask" src = { sourceUri } />
), [inputs]);
return memoizedIframe;
}
export default memo(Iframe);
This is a sample code of my app (running in iframe), return function (cleanup function) not getting executed when the iframe is removed and added back by parent app, this means the component is not getting unmounted but getting mounted as iframe is re-inserted.

React hooks : how to watch changes in a JS class object?

I'm quite new to React and I don't always understand when I have to use hooks and when I don't need them.
What I understand is that you can get/set a state by using
const [myState, setMyState] = React.useState(myStateValue);
So. My component runs some functions based on the url prop :
const playlist = new PlaylistObj();
React.useEffect(() => {
playlist.loadUrl(props.url).then(function(){
console.log("LOADED!");
})
}, [props.url]);
Inside my PlaylistObj class, I have an async function loadUrl(url) that
sets the apiLoading property of the playlist to true
gets content
sets the apiLoading property of the playlist to false
Now, I want to use that value in my React component, so I can set its classes (i'm using classnames) :
<div
className={classNames({
'api-loading': playlist.apiLoading
})}
>
But it doesn't work; the class is not updated, even if i DO get the "LOADED!" message in the console.
It seems that the playlist object is not "watched" by React. Maybe I should use react state here, but how ?
I tested
const [playlist, setPlaylist] = React.useState(new PlaylistObj());
React.useEffect(() => {
//refresh playlist if its URL is updated
playlist.loadUrl(props.playlistUrl).then(function(){
console.log("LOADED!");
})
}, [props.playlistUrl]);
And this, but it seems more and more unlogical to me, and, well, does not work.
const [playlist, setPlaylist] = React.useState(new PlaylistObj());
React.useEffect(() => {
playlist.loadUrl(props.playlistUrl).then(function(){
console.log("LOADED!");
setPlaylist(playlist); //added this
})
}, [props.playlistUrl]);
I just want my component be up-to-date with the playlist object. How should I handle this ?
I feel like I'm missing something.
Thanks a lot!
I think you are close, but basically this issue is you are not actually updating a state reference to trigger another rerender with the correct loading value.
const [playlist, setPlaylist] = React.useState(new PlaylistObj());
React.useEffect(() => {
playlist.loadUrl(props.playlistUrl).then(function(){
setPlaylist(playlist); // <-- this playlist reference doesn't change
})
}, [props.playlistUrl]);
I think you should introduce a second isLoading state to your component. When the effect is triggered whtn the URL updates, start by setting loading true, and when the Promise resolves update it back to false.
const [playlist] = React.useState(new PlaylistObj());
const [isloading, setIsLoading] = React.useState(false);
React.useEffect(() => {
setIsLoading(true);
playlist.loadUrl(props.playlistUrl).then(function(){
console.log("LOADED!");
setIsLoading(false);
});
}, [props.playlistUrl]);
Use the isLoading state in the render
<div
className={classNames({
'api-loading': isLoading,
})}
>
I also suggest using the finally block of a Promise chain to end the loading in the case that the Promise is rejected your UI doesn't get stuck in the loading "state".
React.useEffect(() => {
setIsLoading(true);
playlist.loadUrl(props.playlistUrl)
.then(function() {
console.log("LOADED!");
})
.finally(() => setIsLoading(false));
}, [props.playlistUrl]);
Here you go:
import React from "react";
class PlaylistAPI {
constructor(data = []) {
this.data = data;
this.listeners = [];
}
addListener(fn) {
this.listeners.push(fn);
}
removeEventListener(fn) {
this.listeners = this.listeners.filter(prevFn => prevFn !== fn)
}
setPlayList(data) {
this.data = data;
this.notif();
}
loadUrl(url) {
console.log("called loadUrl", url, this.data)
}
notif() {
this.listeners.forEach(fn => fn());
}
}
export default function App() {
const API = React.useMemo(() => new PlaylistAPI(), []);
React.useEffect(() => {
API.addListener(loadPlaylist);
/**
* Update your playlist and when user job has done, listerners will be called
*/
setTimeout(() => {
API.setPlayList([1,2,3])
}, 3000)
return () => {
API.removeEventListener(loadPlaylist);
}
}, [API])
function loadPlaylist() {
API.loadUrl("my url");
}
return (
<div className="App">
<h1>Watching an object by React Hooks</h1>
</div>
);
}
Demo in Codesandbox

React/reselect how to refresh ui before a selector is recomputed

In my React-App (create-react-app) I use a selector (created with reselect) to compute derived data from stored data.The Problem is, the selector takes a long time to compute. I would like to show a spinner (or a message) on the user interface. But each time the selector is recomputed the ui freezes.
I read a lot of stuff (Web Worker, requestIdleCallback, requestAnimationFrame) and try to make my own React hook but I am stuck. I cannot use the selector in callbacks.
The searched result is simply to get the ui refreshed before the selector is recomputed.
That's my solution. I don't know if it's "good" or if it breaks some rules of react or reselect, but it works. Maybe you can assess that?The code is simplified to improve readability.
The idea is, the selector returns a Promise and I call requestAnimationFrame before computing the data to get a chance to refresh the ui.
selector.js:
const dataSelector = state => state.data;
export const getDataComputedPromise = createSelector([dataSelector], (data) => {
const compute = function () {
return new Promise((resolve) => {
// heavy computing stuff
resolve(computedData);
});
};
return new Promise((resolve) => {
let start = null;
let requestId = null;
function step (timestamp) {
if (!start) {
start = timestamp;
window.cancelAnimationFrame(requestId);
requestId = window.requestAnimationFrame(step);
return;
};
compute().then(freeResources => {
window.cancelAnimationFrame(requestId);
resolve(freeResources);
});
}
requestId = window.requestAnimationFrame(step);
});
});
myPage.js
const MyPage = ({ someProps }) => {
...
const dataComputedPromise = useSelector(getDataComputedPromise);
const [dataComputed, setDataComputed] = useState([]);
const [computeSelector, setComputeSelector] = useState(false);
useEffect(() => {
setComputeSelector(true);
}, [data]);
useEffect(() => {
dataComputedPromise.then(dataComputed => {
setDataComputed(dataComputed);
setComputeSelector(false);
});
}, [dataComputedPromise]);
...
return <div>
<Loader active={compueSelector}>Computing data...</Loader>
</div>;
};
export default MyPage;

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