Fix caps for React concepts (#6712)

Author: rickhanlonii

CONTRIBUTING.md

@@ -79,6 +79,7 @@ Ignore this rule if you're specifically describing an experimental proposal. Mak
 - Use semicolons.
 - No space between function names and parens (`method() {}` not `method () {}`).
 - When in doubt, use the default style favored by [Prettier](https://prettier.io/playground/).
+- Always capitalize React concepts such as Hooks, Effects, and Transitions.
 
 ### Highlighting
 

src/content/learn/manipulating-the-dom-with-refs.md

@@ -493,7 +493,7 @@ In general, you [don't want](/learn/referencing-values-with-refs#best-practices-
 
 React sets `ref.current` during the commit. Before updating the DOM, React sets the affected `ref.current` values to `null`. After updating the DOM, React immediately sets them to the corresponding DOM nodes.
 
-**Usually, you will access refs from event handlers.** If you want to do something with a ref, but there is no particular event to do it in, you might need an Effect. We will discuss effects on the next pages.
+**Usually, you will access refs from event handlers.** If you want to do something with a ref, but there is no particular event to do it in, you might need an Effect. We will discuss Effects on the next pages.
 
 <DeepDive>
 

src/content/reference/react-dom/flushSync.md

@@ -53,7 +53,7 @@ Most of the time, `flushSync` can be avoided. Use `flushSync` as last resort.
 
 * `flushSync` can significantly hurt performance. Use sparingly.
 * `flushSync` may force pending Suspense boundaries to show their `fallback` state.
-* `flushSync` may run pending effects and synchronously apply any updates they contain before returning.
+* `flushSync` may run pending Effects and synchronously apply any updates they contain before returning.
 * `flushSync` may flush updates outside the callback when necessary to flush the updates inside the callback. For example, if there are pending updates from a click, React may flush those before flushing the updates inside the callback.
 
 ---

src/content/reference/react-dom/hydrate.md

@@ -152,7 +152,7 @@ This only works one level deep, and is intended to be an escape hatch. Don’t o
 
 ### Handling different client and server content {/*handling-different-client-and-server-content*/}
 
-If you intentionally need to render something different on the server and the client, you can do a two-pass rendering. Components that render something different on the client can read a [state variable](/reference/react/useState) like `isClient`, which you can set to `true` in an [effect](/reference/react/useEffect):
+If you intentionally need to render something different on the server and the client, you can do a two-pass rendering. Components that render something different on the client can read a [state variable](/reference/react/useState) like `isClient`, which you can set to `true` in an [Effect](/reference/react/useEffect):
 
 <Sandpack>
 

src/content/reference/react-dom/preconnect.md

@@ -55,7 +55,7 @@ The `preconnect` function provides the browser with a hint that it should open a
 #### Caveats {/*caveats*/}
 
 * Multiple calls to `preconnect` with the same server have the same effect as a single call.
-* In the browser, you can call `preconnect` in any situation: while rendering a component, in an effect, in an event handler, and so on.
+* In the browser, you can call `preconnect` in any situation: while rendering a component, in an Effect, in an event handler, and so on.
 * In server-side rendering or when rendering Server Components, `preconnect` only has an effect if you call it while rendering a component or in an async context originating from rendering a component. Any other calls will be ignored.
 * If you know the specific resources you'll need, you can call [other functions](/reference/react-dom/#resource-preloading-apis) instead that will start loading the resources right away.
 * There is no benefit to preconnecting to the same server the webpage itself is hosted from because it's already been connected to by the time the hint would be given.

src/content/reference/react-dom/prefetchDNS.md

@@ -54,7 +54,7 @@ The prefetchDNS function provides the browser with a hint that it should look up
 #### Caveats {/*caveats*/}
 
 * Multiple calls to `prefetchDNS` with the same server have the same effect as a single call.
-* In the browser, you can call `prefetchDNS` in any situation: while rendering a component, in an effect, in an event handler, and so on.
+* In the browser, you can call `prefetchDNS` in any situation: while rendering a component, in an Effect, in an event handler, and so on.
 * In server-side rendering or when rendering Server Components, `prefetchDNS` only has an effect if you call it while rendering a component or in an async context originating from rendering a component. Any other calls will be ignored.
 * If you know the specific resources you'll need, you can call [other functions](/reference/react-dom/#resource-preloading-apis) instead that will start loading the resources right away.
 * There is no benefit to prefetching the same server the webpage itself is hosted from because it's already been looked up by the time the hint would be given.

src/content/reference/react-dom/preinit.md

@@ -67,7 +67,7 @@ The `preinit` function provides the browser with a hint that it should start dow
 #### Caveats {/*caveats*/}
 
 * Multiple calls to `preinit` with the same `href` have the same effect as a single call.
-* In the browser, you can call `preinit` in any situation: while rendering a component, in an effect, in an event handler, and so on.
+* In the browser, you can call `preinit` in any situation: while rendering a component, in an Effect, in an event handler, and so on.
 * In server-side rendering or when rendering Server Components, `preinit` only has an effect if you call it while rendering a component or in an async context originating from rendering a component. Any other calls will be ignored.
 
 ---

src/content/reference/react-dom/preinitModule.md

@@ -65,7 +65,7 @@ The `preinitModule` function provides the browser with a hint that it should sta
 #### Caveats {/*caveats*/}
 
 * Multiple calls to `preinitModule` with the same `href` have the same effect as a single call.
-* In the browser, you can call `preinitModule` in any situation: while rendering a component, in an effect, in an event handler, and so on.
+* In the browser, you can call `preinitModule` in any situation: while rendering a component, in an Effect, in an event handler, and so on.
 * In server-side rendering or when rendering Server Components, `preinitModule` only has an effect if you call it while rendering a component or in an async context originating from rendering a component. Any other calls will be ignored.
 
 ---

src/content/reference/react-dom/preload.md

@@ -72,7 +72,7 @@ The `preload` function provides the browser with a hint that it should start dow
 * Multiple equivalent calls to `preload` have the same effect as a single call. Calls to `preload` are considered equivalent according to the following rules:
   * Two calls are equivalent if they have the same `href`, except:
   * If `as` is set to `image`, two calls are equivalent if they have the same `href`, `imageSrcSet`, and `imageSizes`.
-* In the browser, you can call `preload` in any situation: while rendering a component, in an effect, in an event handler, and so on.
+* In the browser, you can call `preload` in any situation: while rendering a component, in an Effect, in an event handler, and so on.
 * In server-side rendering or when rendering Server Components, `preload` only has an effect if you call it while rendering a component or in an async context originating from rendering a component. Any other calls will be ignored.
 
 ---

src/content/reference/react-dom/preloadModule.md

@@ -66,7 +66,7 @@ The `preloadModule` function provides the browser with a hint that it should sta
 #### Caveats {/*caveats*/}
 
 * Multiple calls to `preloadModule` with the same `href` have the same effect as a single call.
-* In the browser, you can call `preloadModule` in any situation: while rendering a component, in an effect, in an event handler, and so on.
+* In the browser, you can call `preloadModule` in any situation: while rendering a component, in an Effect, in an event handler, and so on.
 * In server-side rendering or when rendering Server Components, `preloadModule` only has an effect if you call it while rendering a component or in an async context originating from rendering a component. Any other calls will be ignored.
 
 ---