List() — react Function Reference

Architecture documentation for the List() function in List.js from the react codebase.

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BabelCompiler→ Validation→ List() — react Function Reference

Dependency Diagram

graph TD
  0a817dda_2579_9564_9d4d_36f63e55c4b9["List()"]
  5fd1ffe1_dc6c_f2c3_53aa_316f8da83850["List.js"]
  0a817dda_2579_9564_9d4d_36f63e55c4b9 -->|defined in| 5fd1ffe1_dc6c_f2c3_53aa_316f8da83850
  style 0a817dda_2579_9564_9d4d_36f63e55c4b9 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/react-devtools-shell/src/app/ToDoList/List.js lines 23–119

export default function List(props: Props): React.Node {
  const [newItemText, setNewItemText] = useState<string>('');
  const [items, setItems] = useState<Array<Item>>([
    {id: 1, isComplete: true, text: 'First'},
    {id: 2, isComplete: true, text: 'Second'},
    {id: 3, isComplete: false, text: 'Third'},
  ]);
  const [uid, setUID] = useState<number>(4);

  const handleClick = useCallback(() => {
    if (newItemText !== '') {
      setItems([
        ...items,
        {
          id: uid,
          isComplete: false,
          text: newItemText,
        },
      ]);
      setUID(uid + 1);
      setNewItemText('');
    }
  }, [newItemText, items, uid]);

  const handleKeyPress = useCallback(
    (event: $FlowFixMe) => {
      if (event.key === 'Enter') {
        handleClick();
      }
    },
    [handleClick],
  );

  const handleChange = useCallback(
    (event: $FlowFixMe) => {
      setNewItemText(event.currentTarget.value);
    },
    [setNewItemText],
  );

  const removeItem = useCallback(
    (itemToRemove: $FlowFixMe) =>
      setItems(items.filter(item => item !== itemToRemove)),
    [items],
  );

  const toggleItem = useCallback(
    (itemToToggle: $FlowFixMe) => {
      // Dont use indexOf()
      // because editing props in DevTools creates a new Object.
      const index = items.findIndex(item => item.id === itemToToggle.id);

      setItems(
        items
          .slice(0, index)
          .concat({
            ...itemToToggle,
            isComplete: !itemToToggle.isComplete,
          })
          .concat(items.slice(index + 1)),
      );
    },
    [items],
  );

  return (
    <Fragment>
      <h1>List</h1>
      <input
        type="text"
        placeholder="New list item..."
        className={styles.Input}
        value={newItemText}
        onChange={handleChange}
        onKeyPress={handleKeyPress}
      />
      <button
        className={styles.IconButton}
        disabled={newItemText === ''}
        onClick={handleClick}>
        <span role="img" aria-label="Add item">