Code Explainers

Code explainers tagged #debouncing

typescript 
import { Component, inject, effect } from '@angular/core';
import { FormControl, ReactiveFormsModule } from '@angular/forms';
import { ActivatedRoute, Router } from '@angular/router';
import { toSignal } from '@angular/core/rxjs-interop';

Debounced search that syncs to the URL in Angular

signals reactive-forms debouncing
Advanced 8 steps
javascript 
import { useState, useEffect, useCallback } from 'react';
 
function getColumnCount(width) {
  if (width < 640) return 1;

A responsive column hook in React

custom-hooks debouncing responsive-design
Intermediate 7 steps
ruby 
class Debouncer
  def initialize(delay:)
    @delay = delay
    @mutex = Mutex.new

A thread-safe debouncer in Ruby

concurrency debouncing mutex
Advanced 5 steps
typescript 
@Component({
  selector: 'app-article-editor',
  templateUrl: './article-editor.component.html',
})

Autosaving a form with RxJS in Angular

reactive-forms rxjs-operators debouncing
Advanced 8 steps
python 
from django.contrib.postgres.search import SearchQuery, SearchRank, SearchVector
from django.core.cache import cache
from django.db.models import F
from django.http import JsonResponse

Ranked full-text search in Django

full-text-search debouncing caching
Advanced 9 steps
javascript 
class HistoryStack {
  constructor(initial = '', limit = 100) {
    this.past = [];
    this.present = initial;

Building an undo/redo history stack

undo-redo state-management debouncing
Intermediate 7 steps
typescript 
import { Injectable } from '@angular/core';
import { HttpClient, HttpParams } from '@angular/common/http';
import {
  Observable,

A city autocomplete service in Angular

rxjs observables debouncing
Intermediate 7 steps
javascript 
import { useState, useEffect, useRef, useCallback } from "react";
 
function useDebouncedValue(value, delay) {
  const [debounced, setDebounced] = useState(value);

Debounced autosave in React

debouncing custom-hooks abort-controller
Intermediate 8 steps
javascript 
function createAutocomplete(input, resultsList, { minChars = 2, delay = 300 } = {}) {
  let timer = null;
  let controller = null;
 

Building a debounced autocomplete widget

debouncing abortcontroller closures
Intermediate 9 steps
typescript 
import { useEffect, useRef, useCallback } from "react";
 
type DraftPayload = Record<string, unknown>;
 

A debounced auto-save hook in React

debouncing request-cancellation refs
Advanced 7 steps
ruby 
class SearchIndexReconciler
  DEBOUNCE_WINDOW = 5.seconds
 
  def self.schedule(record)

Debouncing search reindex jobs in Rails

debouncing background-jobs caching
Advanced 7 steps
typescript 
import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import {
  AsyncValidator,

How an async username validator works in Angular

async-validation reactive-forms rxjs
Intermediate 6 steps