diff --git a/app/javascript/mastodon/features/account/components/account_note.jsx b/app/javascript/mastodon/features/account/components/account_note.jsx
deleted file mode 100644
index 855a1f4fc8..0000000000
--- a/app/javascript/mastodon/features/account/components/account_note.jsx
+++ /dev/null
@@ -1,181 +0,0 @@
-import PropTypes from 'prop-types';
-import { PureComponent } from 'react';
-
-import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
-
-import { is } from 'immutable';
-import ImmutablePureComponent from 'react-immutable-pure-component';
-
-import Textarea from 'react-textarea-autosize';
-
-import { LoadingIndicator } from '@/mastodon/components/loading_indicator';
-
-const messages = defineMessages({
-  placeholder: { id: 'account_note.placeholder', defaultMessage: 'Click to add a note' },
-});
-
-class InlineAlert extends PureComponent {
-
-  static propTypes = {
-    show: PropTypes.bool,
-  };
-
-  state = {
-    mountMessage: false,
-  };
-
-  static TRANSITION_DELAY = 200;
-
-  UNSAFE_componentWillReceiveProps (nextProps) {
-    if (!this.props.show && nextProps.show) {
-      this.setState({ mountMessage: true });
-    } else if (this.props.show && !nextProps.show) {
-      setTimeout(() => this.setState({ mountMessage: false }), InlineAlert.TRANSITION_DELAY);
-    }
-  }
-
-  render () {
-    const { show } = this.props;
-    const { mountMessage } = this.state;
-
-    return (
-      <span aria-live='polite' role='status' className='inline-alert' style={{ opacity: show ? 1 : 0 }}>
-        {mountMessage && <FormattedMessage id='generic.saved' defaultMessage='Saved' />}
-      </span>
-    );
-  }
-
-}
-
-class AccountNote extends ImmutablePureComponent {
-
-  static propTypes = {
-    accountId: PropTypes.string.isRequired,
-    value: PropTypes.string,
-    onSave: PropTypes.func.isRequired,
-    intl: PropTypes.object.isRequired,
-  };
-
-  state = {
-    value: null,
-    saving: false,
-    saved: false,
-  };
-
-  UNSAFE_componentWillMount () {
-    this._reset();
-  }
-
-  UNSAFE_componentWillReceiveProps (nextProps) {
-    const accountWillChange = !is(this.props.accountId, nextProps.accountId);
-    const newState = {};
-
-    if (accountWillChange && this._isDirty()) {
-      this._save(false);
-    }
-
-    if (accountWillChange || nextProps.value === this.state.value) {
-      newState.saving = false;
-    }
-
-    if (this.props.value !== nextProps.value) {
-      newState.value = nextProps.value;
-    }
-
-    this.setState(newState);
-  }
-
-  componentWillUnmount () {
-    if (this._isDirty()) {
-      this._save(false);
-    }
-  }
-
-  setTextareaRef = c => {
-    this.textarea = c;
-  };
-
-  handleChange = e => {
-    this.setState({ value: e.target.value, saving: false });
-  };
-
-  handleKeyDown = e => {
-    if (e.keyCode === 13 && (e.ctrlKey || e.metaKey)) {
-      e.preventDefault();
-
-      if (this.textarea) {
-        this.textarea.blur();
-      } else {
-        this._save();
-      }
-    } else if (e.keyCode === 27) {
-      e.preventDefault();
-
-      this._reset(() => {
-        if (this.textarea) {
-          this.textarea.blur();
-        }
-      });
-    }
-  };
-
-  handleBlur = () => {
-    if (this._isDirty()) {
-      this._save();
-    }
-  };
-
-  _save (showMessage = true) {
-    this.setState({ saving: true }, () => this.props.onSave(this.state.value));
-
-    if (showMessage) {
-      this.setState({ saved: true }, () => setTimeout(() => this.setState({ saved: false }), 2000));
-    }
-  }
-
-  _reset (callback) {
-    this.setState({ value: this.props.value }, callback);
-  }
-
-  _isDirty () {
-    return !this.state.saving && this.props.value !== null && this.state.value !== null && this.state.value !== this.props.value;
-  }
-
-  render () {
-    const { accountId, intl } = this.props;
-    const { value, saved } = this.state;
-
-    if (!accountId) {
-      return null;
-    }
-
-    return (
-      <div className='account__header__account-note'>
-        <label htmlFor={`account-note-${accountId}`}>
-          <FormattedMessage id='account.account_note_header' defaultMessage='Personal note' /> <InlineAlert show={saved} />
-        </label>
-
-        {this.props.value === undefined ? (
-          <div className='account__header__account-note__loading-indicator-wrapper'>
-            <LoadingIndicator />
-          </div>
-        ) : (
-          <Textarea
-            id={`account-note-${accountId}`}
-            className='account__header__account-note__content'
-            disabled={value === null}
-            placeholder={intl.formatMessage(messages.placeholder)}
-            value={value || ''}
-            onChange={this.handleChange}
-            onKeyDown={this.handleKeyDown}
-            onBlur={this.handleBlur}
-            ref={this.setTextareaRef}
-          />
-        )}
-      </div>
-    );
-  }
-
-}
-
-export default injectIntl(AccountNote);
diff --git a/app/javascript/mastodon/features/account/components/account_note.tsx b/app/javascript/mastodon/features/account/components/account_note.tsx
new file mode 100644
index 0000000000..ea3a4cdaca
--- /dev/null
+++ b/app/javascript/mastodon/features/account/components/account_note.tsx
@@ -0,0 +1,131 @@
+import type { ChangeEventHandler, KeyboardEventHandler } from 'react';
+import { useState, useRef, useCallback, useId } from 'react';
+
+import { defineMessages, useIntl, FormattedMessage } from 'react-intl';
+
+import Textarea from 'react-textarea-autosize';
+
+import { submitAccountNote } from '@/mastodon/actions/account_notes';
+import { LoadingIndicator } from '@/mastodon/components/loading_indicator';
+import { useAppDispatch, useAppSelector } from '@/mastodon/store';
+
+const messages = defineMessages({
+  placeholder: {
+    id: 'account_note.placeholder',
+    defaultMessage: 'Click to add a note',
+  },
+});
+
+const AccountNoteUI: React.FC<{
+  initialValue: string | undefined;
+  onSubmit: (newNote: string) => void;
+  wasSaved: boolean;
+}> = ({ initialValue, onSubmit, wasSaved }) => {
+  const intl = useIntl();
+  const uniqueId = useId();
+  const [value, setValue] = useState(initialValue ?? '');
+  const isLoading = initialValue === undefined;
+  const canSubmitOnBlurRef = useRef(true);
+
+  const handleChange = useCallback<ChangeEventHandler<HTMLTextAreaElement>>(
+    (e) => {
+      setValue(e.target.value);
+    },
+    [],
+  );
+
+  const handleKeyDown = useCallback<KeyboardEventHandler<HTMLTextAreaElement>>(
+    (e) => {
+      if (e.key === 'Escape') {
+        e.preventDefault();
+
+        setValue(initialValue ?? '');
+
+        canSubmitOnBlurRef.current = false;
+        e.currentTarget.blur();
+      } else if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) {
+        e.preventDefault();
+
+        onSubmit(value);
+
+        canSubmitOnBlurRef.current = false;
+        e.currentTarget.blur();
+      }
+    },
+    [initialValue, onSubmit, value],
+  );
+
+  const handleBlur = useCallback(() => {
+    if (initialValue !== value && canSubmitOnBlurRef.current) {
+      onSubmit(value);
+    }
+    canSubmitOnBlurRef.current = true;
+  }, [initialValue, onSubmit, value]);
+
+  return (
+    <div className='account__header__account-note'>
+      <label htmlFor={`account-note-${uniqueId}`}>
+        <FormattedMessage
+          id='account.account_note_header'
+          defaultMessage='Personal note'
+        />{' '}
+        <span
+          aria-live='polite'
+          role='status'
+          className='inline-alert'
+          style={{ opacity: wasSaved ? 1 : 0 }}
+        >
+          {wasSaved && (
+            <FormattedMessage id='generic.saved' defaultMessage='Saved' />
+          )}
+        </span>
+      </label>
+      {isLoading ? (
+        <div className='account__header__account-note__loading-indicator-wrapper'>
+          <LoadingIndicator />
+        </div>
+      ) : (
+        <Textarea
+          id={`account-note-${uniqueId}`}
+          className='account__header__account-note__content'
+          placeholder={intl.formatMessage(messages.placeholder)}
+          value={value}
+          onChange={handleChange}
+          onKeyDown={handleKeyDown}
+          onBlur={handleBlur}
+        />
+      )}
+    </div>
+  );
+};
+
+export const AccountNote: React.FC<{
+  accountId: string;
+}> = ({ accountId }) => {
+  const dispatch = useAppDispatch();
+  const initialValue = useAppSelector((state) =>
+    state.relationships.get(accountId)?.get('note'),
+  );
+  const [wasSaved, setWasSaved] = useState(false);
+
+  const handleSubmit = useCallback(
+    (note: string) => {
+      setWasSaved(true);
+      void dispatch(submitAccountNote({ accountId, note }));
+
+      setTimeout(() => {
+        setWasSaved(false);
+      }, 2000);
+    },
+    [dispatch, accountId],
+  );
+
+  return (
+    <AccountNoteUI
+      key={`${accountId}-${initialValue}`}
+      initialValue={initialValue}
+      wasSaved={wasSaved}
+      onSubmit={handleSubmit}
+    />
+  );
+};
diff --git a/app/javascript/mastodon/features/account/containers/account_note_container.js b/app/javascript/mastodon/features/account/containers/account_note_container.js
deleted file mode 100644
index 77de964039..0000000000
--- a/app/javascript/mastodon/features/account/containers/account_note_container.js
+++ /dev/null
@@ -1,19 +0,0 @@
-import { connect } from 'react-redux';
-
-import { submitAccountNote } from 'mastodon/actions/account_notes';
-
-import AccountNote from '../components/account_note';
-
-const mapStateToProps = (state, { accountId }) => ({
-  value: state.relationships.getIn([accountId, 'note']),
-});
-
-const mapDispatchToProps = (dispatch, { accountId }) => ({
-
-  onSave (value) {
-    dispatch(submitAccountNote({ accountId: accountId, note: value }));
-  },
-
-});
-
-export default connect(mapStateToProps, mapDispatchToProps)(AccountNote);
diff --git a/app/javascript/mastodon/features/account_timeline/components/account_header.tsx b/app/javascript/mastodon/features/account_timeline/components/account_header.tsx
index ff70fd0055..a156e0cc36 100644
--- a/app/javascript/mastodon/features/account_timeline/components/account_header.tsx
+++ b/app/javascript/mastodon/features/account_timeline/components/account_header.tsx
@@ -44,8 +44,8 @@ import { FormattedDateWrapper } from 'mastodon/components/formatted_date';
 import { Icon } from 'mastodon/components/icon';
 import { IconButton } from 'mastodon/components/icon_button';
 import { ShortNumber } from 'mastodon/components/short_number';
+import { AccountNote } from 'mastodon/features/account/components/account_note';
 import { DomainPill } from 'mastodon/features/account/components/domain_pill';
-import AccountNoteContainer from 'mastodon/features/account/containers/account_note_container';
 import FollowRequestNoteContainer from 'mastodon/features/account/containers/follow_request_note_container';
 import { useLinks } from 'mastodon/hooks/useLinks';
 import { useIdentity } from 'mastodon/identity_context';
@@ -923,7 +923,7 @@ export const AccountHeader: React.FC<{
                 onClickCapture={handleLinkClick}
               >
                 {account.id !== me && signedIn && (
-                  <AccountNoteContainer accountId={accountId} />
+                  <AccountNote accountId={accountId} />
                 )}
 
                 {account.note.length > 0 && account.note !== '<p></p>' && (