React Router -- 区分listen()中的goBack()和goForward()

Question

问题

使用 React Router v4，如何使用

goBack()

方法区分

goForward()

和

listen()

调用？

据我所知，

location

和

action

参数没有提供足够的信息来区分。

action

参数对于后退和前进都是

POP

。

history.listen((location, action) => {
  // action = 'POP' when goBack() and goForward() are called.
}

我正在使用 history 节点模块。

目的

我有一个面包屑组件，其项目保存在状态中。当用户返回时，我需要弹出最后一个面包屑。

Answer 1

您可以从数组中的

key

对象收集所有

location

值，并使用它来确定键是否按顺序出现在前一个值之前或之后，并使用它来区分

goBack

和

goForward 

.

示例

const keys = [];
let previousKey;

history.listen((location, action) => {
  const { key } = location;

  // If there is no key, it was a goBack.
  if (key === undefined) {
    console.log('goBack')
    return;
  }

  // If it's an entirely new key, it was a goForward.
  // If it was neither of the above, you can compare the index 
  // of `key` to the previous key in your keys array.  
  if (!keys.includes(key)) {
    keys.push(key);
    console.log('goForward');
  } else if (keys.indexOf(key) < keys.indexOf(previousKey)) {
    console.log('goBack');
  } else {
    console.log('goForward');
  }

  previousKey = key;
});

history.push("/test");
history.push("/test/again");
setTimeout(() => history.goBack(), 1000);
setTimeout(() => history.goBack(), 2000);
setTimeout(() => history.goForward(), 3000);

Answer 2

React Router Dom v6 更新：

import { useNavigate } from "react-router-dom";

export const App = () => {
  const navigate = useNavigate();
  const handleClickHome = () => {
    navigate("/home");
  }
  const handleClickBack = () => {
    navigate(-1);
  }
  const handleClickForward = () => {
    navigate(1);
  }
  return (
    <div>
      <button onClick={handleClickHome}>Go Home</button>
      <button onClick={handleClickBack}>Go Back</button>
      <button onClick={handleClickForward}>Go Forward</button>
    </div>
  );
}