miniprogram-cancel-token

Cancle Token for Promise in MiniProgram

APT

CancelTokenSource 外部调用(暴露出的API接口)

• cancel(reason?) 取消操作
• token 调用cancel时所取消的 CancelToken

CancelToken 响应cancel操作(API内部实现)

• #source() 静态方法创建一个CancelTokenSource
• promise 调用cancel时所触发的promise;
• isCancelled() 判断是否已经取消过;
• throwIfRequested() 取消则抛出异常;

usage

function doFoo(foo, cancelToken) {
    return new Promise((resolve, reject) => {
      cancelToken.throwIfRequested();
      cancelToken.promise.then(()=>{
          // do somethig to cancel
          // like xhr.abort()
          foo.abort();
      })
      resolve('something');
  });
}

import CancelToken from 'miniprogram-cancel-token'
//create CancelToken Source
const cts = CancelToken.scoure();
//use canceltoken
doFoo(foo,stc.token).then(console.log);
// cancle it
cts.cancel();

references

• API inspired by https://github.com/PolymerLabs/cancel-token