react-router (v4) how to go back?

问题

Trying to figure out how can I go back to the previous page. I am using [react-router-v4][1]

This is the code I have configured in my first landing page:

<Router>
  <div>
    <Link to="/"><div className="routerStyle"><Glyphicon glyph="home" /></div></Link>
    <Route exact path="/" component={Page1}/>
    <Route path="/Page2" component={Page2}/>
    <Route path="/Page3" component={Page3}/>
  </div>
</Router>

In order to forward to subsequent pages, I simply do:

this.props.history.push('/Page2');

However, how can I go back to previous page? Tried few things like mentioned below but no luck: 1. this.props.history.goBack();

Gives error:

TypeError: null is not an object (evaluating 'this.props')

this.context.router.goBack();

Gives error:

TypeError: null is not an object (evaluating 'this.context')

this.props.history.push('/');

Gives error:

TypeError: null is not an object (evaluating 'this.props')

Posting the Page1 code here below:

import React, {Component} from 'react';
import {Button} from 'react-bootstrap';

class Page1 extends Component {
  constructor(props) {
    super(props);
    this.handleNext = this.handleNext.bind(this);
  }


  handleNext() {
    this.props.history.push('/page2');
  }

  handleBack() {
    this.props.history.push('/');
  }


  /*
   * Main render method of this class
   */
  render() {
    return (
      <div>
        {/* some component code */}


        <div className="navigationButtonsLeft">
          <Button onClick={this.handleBack} bsStyle="success">&lt; Back</Button>
        </div>
        <div className="navigationButtonsRight">
          <Button onClick={this.handleNext} bsStyle="success">Next &gt;</Button>
        </div>

      </div>
    );
  }


export default Page1;

回答1:

I think the issue is with binding:

constructor(props){
   super(props);
   this.goBack = this.goBack.bind(this); // i think you are missing this
}

goBack(){
    this.props.history.goBack();
}

.....

<button onClick={this.goBack}>Go Back</button>

As I have assumed before you posted the code:

constructor(props) {
    super(props);
    this.handleNext = this.handleNext.bind(this);
    this.handleBack = this.handleBack.bind(this); // you are missing this line
}

回答2:

this.props.history.goBack();

This is the correct solution for react-router v4

But one thing you should keep in mind is that you need to make sure this.props.history is existed.

That means you need to call this function this.props.history.goBack(); inside the component that is wrapped by < Route/>

If you call this function in a component that deeper in the component tree, it will not work.

EDIT:

If you want to have history object in the component that is deeper in the component tree (which is not wrapped by < Route>), you can do something like this:

...
import {withRouter} from 'react-router-dom';

class Demo extends Component {
    ...
    // Inside this you can use this.props.history.goBack();
}

export default withRouter(Demo);

回答3:

For use with React Router v4 and a functional component anywhere in the dom-tree.

import React from 'react';
import { withRouter } from 'react-router-dom';

const GoBack = ({ history }) => <img src="./images/back.png" onClick={() => history.goBack()} alt="Go back" />;

export default withRouter(GoBack);

回答4:

Can you provide the code where you use this.props.history.push('/Page2');?

Have you tried the goBack() method?

this.props.history.goBack();

It's listed here https://reacttraining.com/react-router/web/api/history

With a live example here https://reacttraining.com/react-router/web/example/modal-gallery

回答5:

Each answer here has parts of the total solution. Here's the complete solution that I used to get it to work inside of components deeper than where Route was used:

import React, { Component } from 'react'
import { withRouter } from 'react-router-dom'

^ You need that second line to import function and to export component at bottom of page.

render() {
  return (
  ...
    <div onClick={() => this.props.history.goBack()}>GO BACK</div>
  )
}

^ Required the arrow function vs simply onClick={this.props.history.goBack()}

export default withRouter(MyPage)

^ wrap your component's name with 'withRouter()'

回答6:

Try:

this.props.router.goBack()

回答7:

Simply use

<span onClick={() => this.props.history.goBack()}>Back</span>

来源：https://stackoverflow.com/questions/46681387/react-router-v4-how-to-go-back

标签

javascript

reactjs

react-router-v4