Quick Snippets and Code Samples

Read a Single Firestore Document

Strategies for querying a single Firestore document.

Slack API Signing Signature Verification

Verify signed requests from the Slack API with Node.js

Handle Radial Pan Events Flutter

Calculate the rotation of a wheel in Flutter from user pan gestures.

Access the Index on Dart List.map()

How to access the index when using the map method on a Dart List.

Firestore Order by Document ID or Field

How to auto-increment a document field or ID in Firestore

Custom Svelte Store Examples

A quick guide to Svelte custom stores and their use-cases.

Firestore Tag Filtering With in Queries

Query by tag or category labels in Firestore using IN and array-contains-any.

Algolia Instantsearch with Angular

Algolia Instantsearch with Angular 8

Algolia Instantsearch with React

Algolia InstantSearch with React

Algolia Search with Svelte

Algolia InstantSearch with Svelte 3

Setup Google Maps With Svelte 3

How to get started with Google Maps in Svelte 3

Setup Nest on Cloud Functions

Steps to run NestJS on Firebase Cloud Functions

Link Preview Angular

Build a Link Preview Component with Ionic Angular

Link Preview React

Build a Link Preview Component in React

SendGrid Angular

Send transactional email with SendGrid from Angular

SendGrid Flutter

Send transactional email from Flutter with SendGrid

SendGrid React

Send transactional email with SendGrid from ReactJS

SendGrid Svelte

Send transactional email with SendGrid from SvelteJS

SendGrid Vue

Send transactional email from Vue with SendGrid

Cron Example Schedules

Examples of cron expressions for configuring time schedules and cronjobs.

How to Use Firestore Increment

Use the special Firestore Increment field value to increase or decrease numeric values atomically in the database.

Flutter Skeleton Text with Shimmer Animation

Build a Skeleton Text placeholder widget in Flutter with a looping shimmer animation.

How to Upgrade Angular Packages

How to upgrade to the latest packages in Angular

Lazy Loaded Routes Angular V8 with Ivy

Setup Lazy Loaded Routes in Angular 8 with Ivy and Dynamic Imports

Github Action deploying Angular App to Firebase Hosting

A step-by-step guide to create a Github Action to deploy your Angular App to Firebase Hosting.

Intersection Observer for Lazy-Loaded Images

Use IntersectionObserver to lazy load images without listening to scroll events.

Angular Universal SSR Cookbook

Common recipies and solutions for serverside rendering (SSR) with Angular Universal

Improving long relative paths import

Learn how to improve long relative import paths in a large Angular application.

How to Participate on Github

A step-by-step guide to submitting your first Pull Request on Github. Practical tips and advice for git version control.

Javascript Iteration and Loops

Learn how Iteration and Loops Work in JavaScript

Flutter Firebase App Setup

How to setup and configure a new app with FlutterFire for Auth, Firestore, and Analytics

Flutter Google Maps Setup

Setup a Flutter app with Google Maps and GPS Location Tracking

JavaScript Destructuring Pro Tips

Use destructuring assignment in JavaScript to make your code concise and readable

Firestore Security Rules Cookbook

Common Recipes for Firestore Security Rules

Return an @angular/fire User as a Promise

How to return an AngularFire user as a promise

switchMap

RxJS switchMap operator practical examples

Install @angular/fire

How to install @angular/fire, aka AngularFire2

Install Angular

How to install Angular

Install NodeJS

How to Install NodeJS