librz

feature implement or bug fix

• Analyze carefully and propose a solution

understand complex systems

• Depict the process/plan: generates flowcharts or architecture diagrams
• Show me the data flow: traces how information moves through the code
• Visualize the state transitions: useful for UI
• Map the dependencies: clarifies what relies on what

librz

import { useCallback, useEffect, useRef, useState } from "react";
import { useDebouncedCallback } from "use-debounce";

export type UseDebouncedInputOptions = {
  inputDebounced: string;
  onChangeDebounced: (value: string) => void;
  debounceMs?: number;
};

/**

librz

function isFulfilled<T>(
  result: PromiseSettledResult<T>,
): result is PromiseFulfilledResult<T> {
  return result.status === "fulfilled";
}

export async function resolvePromisesInParallel<T>(
  promises: Promise<T>[],
  options?: {
    ignoreFailures?: boolean;

librz

import { groupBy } from "es-toolkit";
import { useCallback, useMemo, useState } from "react";

type SelectAllControl = {
  disabled: boolean;
  checkedState: boolean | "indeterminate";
  onToggleSelect: () => void;
};

type ItemSelectControl<T> = {

librz

import { debounce } from "es-toolkit";
import {
  useCallback,
  useRef,
  useState,
  type ChangeEventHandler,
  type InputHTMLAttributes,
} from "react";
import { useUpdateEffect } from "react-use";

librz

// why this won't work:
// 1. ref is scoped to component
// 2. there's no way to know whether the window is already opened


import { useMemo, useRef } from "react";

export type WindowConfig = {
  /** window path */
  path: string;

librz

export const fruitOptions = [
  {
    value: "apple",
    label: "Apple 🍎",
  },
  {
    value: "grape",
    label: "Grape 🍇",
  },
  {

librz

form.addEventListener('submit', async (e) => {
  e.preventDefault();
  const formData = new FormData(form);
  const response = await fetch(form.action, {
    method: form.method,
    body: formData
  });
  // handle response...
});

librz

import { PauseIcon, PlayIcon } from "Todo";
import { Button } from "Todo";
import * as Slider from "@radix-ui/react-slider";
import classNames from "classnames";
import throttle from "lodash.throttle";
import {
  useCallback,
  useEffect,
  useRef,
  useState,

librz

import { useQuery } from "@tanstack/react-query";
import { useRef, useState } from "react";

async function fetchVideoContentLength(videoUrl: string) {
  const controller = new AbortController();
  const signal = controller.signal;
  try {
    const response = await fetch(videoUrl, {
      // the idiomatic way of requesting only the response headers(without the content) is using a HEAD request, but server may not support the HEAD method
      method: "GET",