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React-modalで簡易モーダル作成

Last updated at Posted at 2019-06-19

##React-modalでお手軽モーダル作成
いざ作るとなると案外めんどくさいモーダルウインドウ
ReactだとReact-modalで簡単に実装できるが、ちょっと悩んだので書き残し

$ npm install react-modal

で導入

Modal.setAppElementを設定してないとエラーが発生するので忘れないように!

ModalWindow.js
import React from 'react';
import Modal from 'react-modal';
const customStyles = {
  content : {
    top                   : '50%',
    left                  : '50%',
    right                 : 'auto',
    bottom                : 'auto',
    marginRight           : '-50%',
    transform             : 'translate(-50%, -50%)'
 }
};

Modal.setAppElement('#your-app') //任意のアプリを設定する create-react-appなら#root
class ModalWindow extends React.Component {
  constructor() {
    super();
    this.state = {
      modalIsOpen: false
    };
    this.openModal = this.openModal.bind(this);
    this.afterOpenModal = this.afterOpenModal.bind(this);
    this.closeModal = this.closeModal.bind(this);
  }
  openModal() {
    this.setState({modalIsOpen: true});
  }
  afterOpenModal() {
    this.subtitle.style.color = '#f00';
  }
  closeModal() {
    this.setState({modalIsOpen: false});
  }
  render() {
    return (
      <div>
        <button onClick={this.openModal}>Open Modal!!</button>
        <Modal
          isOpen={this.state.modalIsOpen}
          onAfterOpen={this.afterOpenModal}
          onRequestClose={this.closeModal}
          style={customStyles}
          contentLabel="Example Modal"
        >
          <h2 ref={subtitle => this.subtitle = subtitle}>ModalWindow</h2>
          <div>Opend</div>
            <button onClick={this.closeModal}>close</button>
        </Modal>
      </div>
    );
  }
}
export default ModalWindow;

モーダルウインドウとモダールを開くトリガーになるボタンを実装している

<Modal></Modal>

の中身がモーダルになる

あとはこれをボタンを配置したいとこに置けばOK

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