pingan8787

const ArrayComponent = () => Array(3).fill(<span>Chris1993</span>); // ❌
function App() {
  return (
    <div className="App">
      <ArrayComponent></ArrayComponent>
    </div>
  );
}

pingan8787

const ConditionComponent = ({ useRender = false }) =>
  useRender ? <span>Render ConditionComponent</span> : <span>error</span>;// ✅
// or
const ConditionComponent = ({ useRender = false }) =>
  useRender ? <span>Render ConditionComponent</span> : null;// ✅

pingan8787

const ConditionComponent = ({ useRender = false }) =>
  useRender ? <span>Render ConditionComponent</span> : false;// ❌
function App() {
  return (
    <div className="App">
        <ConditionComponent useRender></ConditionComponent>
        {/* 'ConditionComponent' cannot be used as a JSX component.
            Its return type 'false | Element' is not a valid JSX element.
            Type 'boolean' is not assignable to type 'ReactElement<any, any>'.
        */}

pingan8787

type IProps = React.PropsWithChildren<{ text: string }>;
const PropsComponent = ({ text }: IProps) => <div>{text}</div>;
function App() {
  return (
    <div className="App">
        <PropsComponent text="Hello Chris1993.">
            <span>children</span>
        </PropsComponent>
    </div>
  );

pingan8787

interface GenericProps<T> {
  content: T;
}
const GenericComponent = <T extends unknown>(props: GenericProps<T>) => {
  const { content } = props;
  const component = <>{content}</>;
  return <div>{component}</div>;
};
function App() {
  return (

pingan8787

interface Props<T> {
  items: T[];
  renderItem: (item: T) => React.ReactNode;
}

const List = <T extends unknown>(props: Props<T>) => {
  const { items, renderItem } = props;
  const [state, setState] = React.useState<T[]>([]); // You can use type T in List function scope.
  return (
    <div>

pingan8787

type FCProps = { text: string; children?: any };
const FCComponent: React.FC<FCProps> = ({ text = "" }) => <div>{text}</div>;
function App() {
  return (
    <div className="App">
        <FCComponent text="Hello Chris1993.">
            <span>children</span>
        </FCComponent>
    </div>
  );

pingan8787

type FCProps = { text: string };
const ElementComponent = ({ text }: FCProps): JSX.Element => <div>{text}</div>;
function App() {
  return (
    <div className="App">
        <ElementComponent text="Hello Chris1993."></ElementComponent>
    </div>
  );
}

pingan8787

interface GenericProps<T> {
  content: T;
}
const GenericComponent = <T extends unknown>(props: GenericProps<T>) => {
  const { content } = props;
  const component = <>{content}</>;
  return <div>{component}</div>;
};
function App() {
  return (

pingan8787

interface Props<T> {
  items: T[];
  renderItem: (item: T) => React.ReactNode;
}

const List = <T extends unknown>(props: Props<T>) => {
  const { items, renderItem } = props;
  const [state, setState] = React.useState<T[]>([]); // You can use type T in List function scope.
  return (
    <div>