function cancel(promise) {
const obj = {};
const p = new Promise((resolve, reject) => {
obj.resolve = resolve;
obj.reject = reject;
});
obj.promise = Promise.race([p, promise]);
return obj;
}
// 使用
const testPromise = new Promise((resolve, reject) => {
setTimeout(() => {
resolve(123);
}, 1000);
});
const cancelPromise = cancel(testPromise);
cancelPromise.promise.then(res => {
console.log(res);
});
// 取消
cancelPromise.resolve("取消");