reactjs

대한 react-routerV3.0의

페이지에 저장되지 않은 변경 사항에 대한 확인 메시지가 필요한 동일한 문제가 발생했습니다. 제 경우에는 React Router v3을 사용 하고 있었기 때문에 React Router v4<Prompt /> 에서 도입 한을 사용할 수 없었습니다 .

나는의 조합으로 ‘뒤로’버튼 클릭 ‘과’실수로 링크를 클릭 ‘으로 처리 setRouteLeaveHook하고 history.pushState(), 그리고 함께’새로 고침 버튼을 ‘처리하는 onbeforeunload이벤트 핸들러.

setRouteLeaveHook ( doc ) 및 history.pushState ( doc )

• setRouteLeaveHook 만 사용하는 것만으로는 충분하지 않았습니다. 왠지 ‘뒤로’버튼을 클릭했을 때 페이지는 그대로 유지 되었으나 URL이 변경되었습니다.

    // setRouteLeaveHook returns the unregister method
    this.unregisterRouteHook = this.props.router.setRouteLeaveHook(
      this.props.route,
      this.routerWillLeave
    );
  
    ...
  
    routerWillLeave = nextLocation => {
      // Using native 'confirm' method to show confirmation message
      const result = confirm('Unsaved work will be lost');
      if (result) {
        // navigation confirmed
        return true;
      } else {
        // navigation canceled, pushing the previous path
        window.history.pushState(null, null, this.props.route.path);
        return false;
      }
    };

onbeforeunload ( 문서 )

• ‘실수 재 장전’버튼 처리에 사용됩니다.

  window.onbeforeunload = this.handleOnBeforeUnload;
  
  ...
  
  handleOnBeforeUnload = e => {
    const message = 'Are you sure?';
    e.returnValue = message;
    return message;
  }

아래는 내가 작성한 전체 구성 요소입니다.

• 참고 withRouter가 가지고하는 데 사용됩니다 this.props.router.
• 참고 this.props.route호출 구성 요소에서 아래로 전달됩니다

• 참고 currentState소품으로 전달되어 초기 상태가하고 변화를 확인하기 위해

  import React from 'react';
  import PropTypes from 'prop-types';
  import _ from 'lodash';
  import { withRouter } from 'react-router';
  import Component from '../Component';
  import styles from './PreventRouteChange.css';
  
  class PreventRouteChange extends Component {
    constructor(props) {
      super(props);
      this.state = {
        // initialize the initial state to check any change
        initialState: _.cloneDeep(props.currentState),
        hookMounted: false
      };
    }
  
    componentDidUpdate() {
  
     // I used the library called 'lodash'
     // but you can use your own way to check any unsaved changed
      const unsaved = !_.isEqual(
        this.state.initialState,
        this.props.currentState
      );
  
      if (!unsaved && this.state.hookMounted) {
        // unregister hooks
        this.setState({ hookMounted: false });
        this.unregisterRouteHook();
        window.onbeforeunload = null;
      } else if (unsaved && !this.state.hookMounted) {
        // register hooks
        this.setState({ hookMounted: true });
        this.unregisterRouteHook = this.props.router.setRouteLeaveHook(
          this.props.route,
          this.routerWillLeave
        );
        window.onbeforeunload = this.handleOnBeforeUnload;
      }
    }
  
    componentWillUnmount() {
      // unregister onbeforeunload event handler
      window.onbeforeunload = null;
    }
  
    handleOnBeforeUnload = e => {
      const message = 'Are you sure?';
      e.returnValue = message;
      return message;
    };
  
    routerWillLeave = nextLocation => {
      const result = confirm('Unsaved work will be lost');
      if (result) {
        return true;
      } else {
        window.history.pushState(null, null, this.props.route.path);
        if (this.formStartEle) {
          this.moveTo.move(this.formStartEle);
        }
        return false;
      }
    };
  
    render() {
      return (
        <div>
          {this.props.children}
        </div>
      );
    }
  }
  
  PreventRouteChange.propTypes = propTypes;
  
  export default withRouter(PreventRouteChange);

질문이 있으면 알려주세요 🙂

답변

import React, { Component } from "react";
import { BrowserRouter as Router, Route, Link, Prompt } from "react-router-dom";

function PreventingTransitionsExample() {
  return (
    <Router>
      <div>
        <ul>
          <li>
            <Link to="/">Form</Link>
          </li>
          <li>
            <Link to="/one">One</Link>
          </li>
          <li>
            <Link to="/two">Two</Link>
          </li>
        </ul>
        <Route path="/" exact component={Form} />
        <Route path="/one" render={() => <h3>One</h3>} />
        <Route path="/two" render={() => <h3>Two</h3>} />
      </div>
    </Router>
  );
}

class Form extends Component {
  state = { isBlocking: false };

  render() {
    let { isBlocking } = this.state;

    return (
      <form
        onSubmit={event => {
          event.preventDefault();
          event.target.reset();
          this.setState({
            isBlocking: false
          });
        }}
      >
        <Prompt
          when={isBlocking}
          message={location =>
            `Are you sure you want to go to ${location.pathname}`
          }
        />

        <p>
          Blocking?{" "}
          {isBlocking ? "Yes, click a link or the back button" : "Nope"}
        </p>

        <p>
          <input
            size="50"
            placeholder="type something to block transitions"
            onChange={event => {
              this.setState({
                isBlocking: event.target.value.length > 0
              });
            }}
          />
        </p>

        <p>
          <button>Submit to stop blocking</button>
        </p>
      </form>
    );
  }
}

export default PreventingTransitionsExample;

componentWillMount() {
    this.props.history.listen(() => {
      // Detecting, user has changed URL
      console.info(this.props.history.location.pathname);
    });
}