React createPortal 创建穿梭组件

React createPortal 创建穿梭组件

const PortalComponent = ({ children, onClose }) => {
  return createPortal(
    <div className="modal" style={modalStyle} onClick={onClose}>
      {children}
    </div>,
    // get outer DOM element
    document.getElementById("portal")
  );
};

class App extends React.Component {
  constructor(props) {
    super(props);

    this.state = {
      modalOpen: false
    };
  }

  render() {
    return (
      <div style={styles}>
        <Hello name="CodeSandbox" />
        <h2>Start editing to see some magic happen {"\u2728"}</h2>
        <button onClick={() => this.setState({ modalOpen: true })}>
          Open modal
        </button>
        {this.state.modalOpen && (
          <PortalComponent onClose={() => this.setState({ modalOpen: false })}>
            <h1>This is modal content</h1>
          </PortalComponent>
        )}
      </div>
    );
  }
}

render(<App />, document.getElementById("root"));