Code Explainers

Code explainers tagged #cancellation

javascript 
import { useReducer, useEffect } from "react";
 
const initialState = { status: "idle", data: null, error: null };
 

Building a data-fetching hook in React

custom-hooks usereducer data-fetching
Intermediate 9 steps
python 
import asyncio
import json
 
from fastapi import APIRouter, Depends, HTTPException

Streaming export progress with SSE in FastAPI

server-sent-events async-generators streaming
Advanced 8 steps
javascript 
export function createSearchClient(baseUrl) {
  let inFlight = null;
 
  async function search(query, { signal } = {}) {

Cancelling stale requests in a search client

closures abortcontroller async
Intermediate 8 steps
typescript 
type SearchResult = {
  id: string;
  title: string;
};

Cancelling stale searches with AbortController

abortcontroller cancellation async
Intermediate 7 steps