axios 中用于取消請求
這個文檔中都有 文檔 cancellation
CancelToken.source()

const source = axios.CancelToken.source();//這里初始化source對象

axios.get('/user/12345', {
  cancelToken: source.token
}).catch(function(thrown) {
  if (axios.isCancel(thrown)) {
    console.log('這里判斷請求是被取消的', thrown.message);
  } else {
    // handle error
  }
});
source.cancel('取消請求 會被catch捕捉到');

source 方法是CancelToken的一個工廠方法

CancelToken.source = function source() {
  var cancel;
  var token = new CancelToken(function executor(c) {
    cancel = c;
  });
  return {
    token: token,
    cancel: cancel
  };
};

CancelToken

const CancelToken = axios.CancelToken;
let cancel;

axios.get('/user/12345', {
  cancelToken: new CancelToken(function executor(c) {
    // An executor function receives a cancel function as a parameter
    cancel = c;
  })
});

// cancel the request
cancel();

axios.create方法提供了cancalToken參數(shù)，用于取消網(wǎng)絡(luò)請求。