docs: fixed typo

src/plugins/data/hooks.js

@@ -1,107 +1,3 @@
-import {
-  useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState,
-} from 'react';
-import { getConfig } from '@edx/frontend-platform';
-import { PLUGIN_MOUNTED, PLUGIN_READY, PLUGIN_UNMOUNTED } from './constants';
-
-export function usePluginSlot(id) {
-  if (getConfig().plugins[id] !== undefined) {
-    return getConfig().plugins[id];
-  }
-  return { keepDefault: true, plugins: [] };
-}
-
-export function useMessageEvent(srcWindow, type, callback) {
-  useLayoutEffect(() => {
-    const listener = (event) => {
-      // Filter messages to those from our source window.
-      if (event.source === srcWindow) {
-        if (event.data.type === type) {
-          callback({ type, payload: event.data.payload });
-        }
-      }
-    };
-    if (srcWindow !== null) {
-      global.addEventListener('message', listener);
-    }
-    return () => {
-      global.removeEventListener('message', listener);
-    };
-  }, [srcWindow, type, callback]);
-}
-
-export function useHostEvent(type, callback) {
-  useMessageEvent(global.parent, type, callback);
-}
-
-export function usePluginEvent(iframeElement, type, callback) {
-  const contentWindow = iframeElement ? iframeElement.contentWindow : null;
-  useMessageEvent(contentWindow, type, callback);
-}
-
-export function dispatchMessageEvent(targetWindow, message, targetOrigin) {
-  // Checking targetOrigin falsiness here since '', null or undefined would all be reasons not to
-  // try to post a message to the origin.
-  if (targetOrigin) {
-    targetWindow.postMessage(message, targetOrigin);
-  }
-}
-
-export function dispatchPluginEvent(iframeElement, message, targetOrigin) {
-  dispatchMessageEvent(iframeElement.contentWindow, message, targetOrigin);
-}
-
-export function dispatchHostEvent(message) {
-  dispatchMessageEvent(global.parent, message, global.document.referrer);
-}
-
-export function dispatchReadyEvent() {
-  dispatchHostEvent({ type: PLUGIN_READY });
-}
-
-export function dispatchMountedEvent() {
-  dispatchHostEvent({ type: PLUGIN_MOUNTED });
-}
-
-export function dispatchUnmountedEvent() {
-  dispatchHostEvent({ type: PLUGIN_UNMOUNTED });
-}
-
-export function useElementSize() {
-  const observerRef = useRef();
-
-  const [dimensions, setDimensions] = useState({ width: 0, height: 0 });
-  const [offset, setOffset] = useState({ x: 0, y: 0 });
-
-  const [element, setElement] = useState(null);
-
-  const measuredRef = useCallback(_element => {
-    setElement(_element);
-  }, []);
-
-  useEffect(() => {
-    observerRef.current = new ResizeObserver(() => {
-      if (element) {
-        setDimensions({
-          width: element.clientWidth,
-          height: element.clientHeight,
-        });
-        setOffset({
-          x: element.offsetLeft,
-          y: element.offsetTop,
-        });
-      }
-    });
-    if (element) {
-      observerRef.current.observe(element);
-    }
-  }, [element]);
-
-  return useMemo(
-    () => ([measuredRef, element, dimensions.width, dimensions.height, offset.x, offset.y]),
-    [measuredRef, element, dimensions, offset],
-  );
-}
 /**
  * Hooks file for functions that handle the communication between a Plugin and its Host
  */