30-seconds-of-code/snippets/ModalDialog.md

Modal/Dialog

Renders a dialog component with modal.

This is a simple React ModalDialog Component.It owns 4 props: show、close、title and clickModal2Hide.

• close prop defines the method for closing the dialog.
• title prop determines the title of the dialog.
• clickModal2Hide prop determines whether we can close the dialog via clicking on modal.

Create 3 methods and bind them to component:

• close used to call the close prop to close the dialog.
• modalClick used to define the click event handler of the modal.When clickModal2Hide prop passed as true,the modalClick will close the dialog when modal clicked.
• dialogClick used to stop propagation of the modal click event.You can define more logics in this method.

Use children prop to get the content of the dialog passed by Component User.Render the content in dialog-content class div.

  .modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 9998;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  .dialog {
    background-color: white;
    border-radius: 5px;
    overflow: hidden;
  }
  .dialog-title {
    box-sizing: border-box;
    width: 100%;
    height: 48px;
    padding: 0 16px;
    border-bottom: 0.5px solid #c3c3c3;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .dialog-close {
    font-size: 32px;
    color: #c3c3c3;
    cursor: pointer;
    transform: rotate(45deg);
    user-select: none;
  }
  .dialog-close:hover {
    color: red;
  }
  .dialog-content {
    min-width: 300px;
  }

class Dialog extends React.Component {
  constructor() {
    super();
    this.modalHandler = (e) => {
      this.setState({
        data: e.detail.data,
        visible: true
      });
    };
    this.state = {
      data: {
        title: '',
        content: ''
      },
      visible: false
    };
    this.close = this.close.bind(this);
    this.modalClick = this.modalClick.bind(this);
  }
  render() {
    return <div className="modal" onClick={this.modalClick} style={{ display: this.state.visible ? '' : 'none'}}>
      <div className="dialog">
        <div className="dialog-title">{ this.state.data.title }<span className="dialog-close" onClick={this.close}>+</span></div>
        <div className="dialog-content">
          {
            this.state.data.content
          }
        </div>
      </div>
    </div>
  }
  componentDidMount() {
    document.addEventListener('modal', this.modalHandler);
  }
  componentWillUnmount() {
    document.removeEventListener('modal', this.modalHandler);
  }
  close() {
    this.setState({
      visible: false
    });
  }
  static show(data) {
    document.dispatchEvent(new CustomEvent('modal', {
      detail: {
        data
      }
    }));
  }
  modalClick() {
    if (this.props.clickModal2Hide) this.close();
  }
}

// add to render function
<Dialog clickModal2Hide={true} show={true}/>

// every time you wanna call the dialog
// content is a jsx element
ModalDialog.show({
  title: 'Test', 
  content: <img src="https://github.com/zhongdeming428/30-seconds-of-react/raw/master/logo.png"/>
});