Sync with react.dev @ 152a471a

src/components/ButtonLink.tsx

@@ -33,7 +33,7 @@ function ButtonLink({
     className,
     'active:scale-[.98] transition-transform inline-flex font-bold items-center outline-none focus:outline-none focus-visible:outline focus-visible:outline-link focus:outline-offset-2 focus-visible:dark:focus:outline-link-dark leading-snug',
     {
-      'bg-link text-white dark:bg-brand-dark dark:text-secondary hover:bg-opacity-80':
+      'bg-link text-white dark:bg-brand-dark dark:text-gray-90 hover:bg-opacity-80':
         type === 'primary',
       'text-primary dark:text-primary-dark shadow-secondary-button-stroke dark:shadow-secondary-button-stroke-dark hover:bg-gray-40/5 active:bg-gray-40/10 hover:dark:bg-gray-60/5 active:dark:bg-gray-60/10':
         type === 'secondary',

src/content/community/conferences.md

@@ -25,6 +25,11 @@ September 10-11,  2026. In-person in Zurich, Switzerland
 
 [Website](https://conf.zurichjs.com?utm_campaign=ZurichJS_Conf&utm_source=referral&utm_content=reactjs_community_conferences) - [Twitter](https://x.com/zurichjs) - [LinkedIn](https://www.linkedin.com/company/zurichjs/)
 
+### React Conf Japan 2027 {/*react-conf-japan-2027*/}
+April 24,  2027. In-person in Tokyo, Japan
+
+[Website](https://reactconf.jp/) - [Twitter](https://x.com/reactconfjp)
+
 ## Past Conferences {/*past-conferences*/}
 
 ### CityJS New Delhi 2026 {/*cityjs-newdelhi-2026*/}

src/content/reference/react-dom/components/form.md

@@ -48,9 +48,47 @@ To create interactive controls for submitting information, render the [built-in
 
 ## Usage {/*usage*/}
 
-### Handle form submission on the client {/*handle-form-submission-on-the-client*/}
+### Handle form submission with an event handler {/*handle-form-submission-with-an-event-handler*/}
 
-Pass a function to the `action` prop of form to run the function when the form is submitted. [`formData`](https://developer.mozilla.org/en-US/docs/Web/API/FormData) will be passed to the function as an argument so you can access the data submitted by the form. This differs from the conventional [HTML action](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/form#action), which only accepts URLs. After the `action` function succeeds, all uncontrolled field elements in the form are reset.
+Pass a function to the `onSubmit` event handler to run code when the form is submitted. By default, the browser sends the form data to the current URL and refreshes the page, so call [`e.preventDefault()`](https://developer.mozilla.org/en-US/docs/Web/API/Event/preventDefault) to override that behavior.
+
+This example reads the submitted values with [`new FormData(e.target)`](https://developer.mozilla.org/en-US/docs/Web/API/FormData), which collects every field by its `name`. This keeps the inputs [uncontrolled](/reference/react-dom/components/input#reading-the-input-values-when-submitting-a-form). If you instead [control an input with state](/reference/react-dom/components/input#controlling-an-input-with-a-state-variable), read from that state on submit rather than from `FormData`.
+
+<Sandpack>
+
+```js src/App.js
+export default function Search() {
+  function handleSubmit(e) {
+    // Prevent the browser from reloading the page
+    e.preventDefault();
+
+    // Read the form data
+    const form = e.target;
+    const formData = new FormData(form);
+    const query = formData.get("query");
+    alert(`You searched for '${query}'`);
+  }
+
+  return (
+    <form onSubmit={handleSubmit}>
+      <input name="query" />
+      <button type="submit">Search</button>
+    </form>
+  );
+}
+```
+
+</Sandpack>
+
+<Note>
+
+Reading form data with `onSubmit` works in every version of React and gives you direct access to the [submit event](https://developer.mozilla.org/en-US/docs/Web/API/HTMLFormElement/submit_event), so you can call `e.preventDefault()` and read the data yourself. Passing the function to the `action` prop instead runs the submission in a [Transition](/reference/react/useTransition). React then tracks the pending state, sends thrown errors to the nearest error boundary, and lets the form work with [`useActionState`](/reference/react/useActionState) and [`useOptimistic`](/reference/react/useOptimistic). An `action` can also be a [Server Function](/reference/rsc/server-functions), which `onSubmit` does not support.
+
+</Note>
+
+### Handle form submission with an action prop {/*handle-form-submission-with-an-action-prop*/}
+
+Pass a function to the `action` prop of form to run the function when the form is submitted. [`formData`](https://developer.mozilla.org/en-US/docs/Web/API/FormData) will be passed to the function as an argument so you can access the data submitted by the form. This differs from the conventional [HTML action](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/form#action), which only accepts URLs. Unlike `onSubmit`, an `action` runs in a [Transition](/reference/react/useTransition) and calling `e.preventDefault()` isn't needed. After the `action` function succeeds, all uncontrolled field elements in the form are reset.
 
 <Sandpack>
 

src/content/reference/react/Component.md

@@ -1009,7 +1009,7 @@ Deriving state leads to verbose code and makes your components difficult to thin
 
 #### Caveats {/*static-getderivedstatefromprops-caveats*/}
 
-- This method is fired on *every* render, regardless of the cause. This is different from [`UNSAFE_componentWillReceiveProps`](#unsafe_cmoponentwillreceiveprops), which only fires when the parent causes a re-render and not as a result of a local `setState`.
+- This method is fired on *every* render, regardless of the cause. This is different from [`UNSAFE_componentWillReceiveProps`](#unsafe_componentwillreceiveprops), which only fires when the parent causes a re-render and not as a result of a local `setState`.
 
 - This method doesn't have access to the component instance. If you'd like, you can reuse some code between `static getDerivedStateFromProps` and the other class methods by extracting pure functions of the component props and state outside the class definition.