取消 promise

[nmsn]

原文：https://juejin.cn/post/6844904148899463175

function wrap(p) {
  let obj = {};
  let p1 = new Promise((resolve, reject) => {
    obj.resolve = resolve;
    obj.reject = reject;
  });
  obj.promise = Promise.race([p1, p]);
  return obj;
}

let promise = new Promise((resolve, reject) => {
  setTimeout(() => {
    resolve(123);
  }, 1000);
});
let obj = wrap(promise);
obj.promise.then(res => {
  console.log(res);
});
obj.resolve("请求被拦截了");

obj.reject("请求被拒绝了");