1
0
mirror of https://github.com/matrix-org/matrix-react-sdk.git synced 2025-07-28 15:22:05 +03:00

replace @use-it/event-listener as it doesn't like Node EE's

This commit is contained in:
Michael Telatynski
2019-10-19 16:39:06 +01:00
parent fa8ad70880
commit 0e6359ab24
4 changed files with 41 additions and 15 deletions

View File

@ -0,0 +1,35 @@
import {useRef, useEffect} from "react";
// Hook to wrap event emitter on and removeListener in hook lifecycle
export const useEventEmitter = (emitter, eventName, handler) => {
// Create a ref that stores handler
const savedHandler = useRef();
// Update ref.current value if handler changes.
// This allows our effect below to always get latest handler ...
// ... without us needing to pass it in effect deps array ...
// ... and potentially cause effect to re-run every render.
useEffect(() => {
savedHandler.current = handler;
}, [handler]);
useEffect(
() => {
// Make sure element supports on
const isSupported = emitter && emitter.on;
if (!isSupported) return;
// Create event listener that calls handler function stored in ref
const eventListener = event => savedHandler.current(event);
// Add event listener
emitter.on(eventName, eventListener);
// Remove event listener on cleanup
return () => {
emitter.removeListener(eventName, eventListener);
};
},
[eventName, emitter], // Re-run if eventName or emitter changes
);
};