Consume Protocol Buffer messages with Ionic
Published: 14. January 2017 • Updated: 1. December 2018 • ionic, spring, java, javascript
Published: 14. January 2017 • Updated: 1. December 2018 • ionic, spring, java, javascript
Published: 26. January 2017 • Updated: 4. December 2018 • angular, ionic, spring, java, javascript
Example of form validation in an Ionic Angular application. How to create custom synchronous and asynchronous validators and how to validate data on the server with the Jakarta Bean Validation framework.
Published: 20. January 2017 • Updated: 17. March 2026 • database, javascript
An introduction to the localStorage API for client-side persistence in web applications
Published: 22. February 2017 • Updated: 17. March 2026 • ionic, javascript
In this post, we look at a way to display charts from the ECharts library in an Ionic app
Published: 5. February 2017 • Updated: 17. March 2026 • ionic, spring, java, javascript
How to implement a JWT authentication system with Ionic/Angular and Spring Boot.
Published: 12. September 2017 • Updated: 30. October 2017 • database, javascript
IndexedDB, the browser's built-in database. How it works and what you can do with it.
Published: 25. September 2017 • Updated: 4. December 2018 • javascript
Creating a trivial password manager with the Web Cryptography API and the Ionic framework.
Published: 15. September 2017 • Updated: 3. December 2018 • database, javascript, ionic
Example of an Ionic web application that stores data in IndexedDB and works offline.
Published: 21. September 2017 • Updated: 4. December 2018 • spring, java, javascript, ionic
In this blog, we create REST services in Spring Boot and consume them in an Ionic app. We use the OpenAPI specification for generating API documentation and the client TypeScript code.
Published: 5. November 2017 • Updated: 3. December 2018 • ionic, java, spring, javascript
In this blog post we create an Ionic app that dynamically requests location data points from a Spring Boot server and displays them on an OpenStreetMap map. The data points are stored in a MongoDB database, and we take advantage of the geospatial query support to read the data points only for a certain area.
Published: 18. December 2017 • Updated: 17. March 2026 • ionic, javascript, java, spring
In this blog post I present two different ways to integrate speech recognition functionality into an Ionic app: the Web Speech API and RecordRTC together with the Google Cloud Speech API.
Published: 8. January 2018 • Updated: 3. March 2026 • javascript
A closer look at the date-fns date/time library.
Published: 9. January 2018 • pwa, javascript
Explore the methods of the Cache API, which is primarily used in Service Workers to cache assets but can also serve as a general-purpose cache.
Published: 6. January 2018 • Updated: 21. March 2026 • ionic, angular, javascript
How to use custom SVG icons in a current Ionic application
Published: 12. January 2018 • database, javascript
In this blog post, I give you an overview of Dexie, a minimalistic wrapper library for IndexedDB. Write simpler and more concise IndexedDB code with Dexie.
Published: 9. January 2018 • Updated: 21. March 2026 • java, javascript, pwa, spring
This blog post shows how to send browser push messages from a Spring Boot application with Firebase Cloud Messaging. The client uses a service worker, IndexedDB, and the current FCM token flow for web apps.
Published: 12. January 2018 • Updated: 21. March 2026 • database, javascript, ionic
This blog post shows how to use Dexie in a TypeScript application
Published: 27. February 2018 • java, javascript
Writing human-readable regular expressions with the VerbalExpressions library
Published: 28. February 2018 • Updated: 22. March 2026 • java, javascript
Build a simple polling application with Spring Boot, Vite, JavaScript, and server-sent events, and update the results live in an ECharts pie chart.
Published: 3. May 2018 • Updated: 21. March 2026 • java, javascript
In this blog post, I present examples that check passwords against commonly used and compromised password datasets.
Published: 26. June 2018 • pwa, javascript, java, spring, ionic
This blog post takes a closer look at the Background Sync API, shows how to use it as a progressive enhancement, and presents an example that synchronizes data between an Ionic web application and a Spring Boot server application.
Published: 22. June 2018 • Updated: 21. March 2026 • pwa, javascript
This tutorial shows how to integrate a custom Workbox service worker into an Angular application with a Vite-based build step.
Published: 5. September 2018 • Updated: 21. March 2026 • javascript
The Beacon API lets a browser queue small POST requests without blocking navigation. This post explains when to use sendBeacon(), when fetch keepalive is the better choice, and walks through several practical examples.
Published: 3. September 2018 • javascript
A closer look at the ES2020 numeric primitive BigInt
Published: 5. October 2018 • javascript
How to register a global error handler in a standalone Angular application, send reports to a back end, and queue failed reports in IndexedDB until the browser can retry them.
Published: 4. October 2018 • java, javascript
Converting text from a web application into speech with Google Cloud Text-to-Speech
Published: 9. December 2018 • pwa, javascript, ionic
In this blog post, we combine Angular's generated service worker with custom Background Sync logic in an Ionic and Angular application.
Published: 11. December 2018 • java, spring, ionic, javascript
This post shows how to upload images from an Ionic web application directly to Google Cloud Storage with V4 signed URLs and analyze them with Google Cloud Vision from a Spring Boot back end.
Published: 23. December 2018 • java, javascript
Building a simple feedforward neural network in Java and JavaScript, training it with MNIST, and using the exported weights for browser-based digit recognition
Published: 4. January 2019 • javascript, java
How to serialize and deserialize JavaScript BigInt values in JSON in a full-stack application with Spring Boot
Published: 4. January 2019 • javascript
In this blog post, we are going to create two neural networks with brain.js and Tensorflow.js, train them with the MNIST dataset, and use the trained models in a web application to detect digits.
Published: 19. January 2019 • javascript
A collection of examples with the spread and rest syntax in JavaScript
Published: 15. February 2019 • Updated: 20. March 2026 • javascript, ionic
This blog post shows how to integrate Font Awesome icons into a modern standalone Angular and Ionic application with the official Angular library.
Published: 13. June 2019 • java, javascript, spring, ionic
How to create a frictionless password auto-login experience with the Credential Management API.
Published: 12. June 2019 • java, spring, javascript
How to expose version numbers, build timestamps, and Git metadata in Spring Boot and Angular applications
Published: 10. June 2019 • javascript, ionic
A tutorial on how to use Google Fonts in an Angular / Ionic app. The blog post presents two approaches. One approach links to the Google Fonts service, and the second approach shows how to self-host the fonts in your application.
Published: 11. June 2019 • Updated: 19. March 2026 • java, javascript, spring, ionic
How to integrate tus.io implementations into JavaScript and Java applications to create reliable and resumable file uploads over HTTP.
Published: 11. June 2019 • Updated: 19. March 2026 • java, spring, javascript, ionic, capacitor
How to take pictures with the Capacitor camera plugin and upload them to a Spring Boot application with Angular's HttpClient and tus.io.
Published: 30. July 2019 • Updated: 4. March 2026 • javascript
In this blog post, we develop an Angular/Ionic application that runs optical character recognition (OCR) in a browser with Tesseract.js. This application does not depend on any server-side code, and the recognition process runs locally in the browser.
Published: 29. July 2019 • javascript
What the Page Visibility API is, how to use it in modern web applications, and how a few small native helpers can remove repetitive visibility checks.
Published: 31. July 2019 • javascript
This blog post explains when Web Workers help, how message passing and transferables work, how Angular CLI supports workers today, and how Comlink simplifies the Web Worker programming model.
Published: 10. August 2019 • Updated: 20. March 2026 • javascript
A closer look at Ky, a tiny HTTP client built on top of the Fetch API for browsers, Node.js, Bun, and Deno.
Published: 25. August 2019 • Updated: 20. March 2026 • javascript, java, spring, ionic
In this blog post, we build a passwordless sign-in flow with WebAuthn, an Ionic / Angular front end, and a Spring Boot back end secured with Spring Security.
Published: 13. August 2019 • java, javascript
Sending Web Push notifications from a Java back end to a web browser
Published: 3. April 2020 • Updated: 20. June 2021 • ionic, spring, javascript, capacitor, java
In this blog post, we take a closer look at how to receive push notifications with Capacitor and how to send them from a Spring Boot application.
Published: 4. April 2020 • Updated: 20. May 2021 • javascript, java
In this blog post, we are going to take a look at how to send Protocol Buffers messages from an Angular app to a Spring Boot backend.
Published: 21. April 2020 • Updated: 21. May 2021 • javascript, angular
In this blog post, we take a look at the YouTube Player and Google Maps component from the angular/components repository.
Published: 11. April 2020 • Updated: 20. May 2021 • javascript
In this blog post, we take a closer look at the webSocket function from the RxJS library, a wrapper around the native WebSocket object.
Published: 2. May 2020 • Updated: 15. March 2026 • javascript, java
In this tutorial, I show you how to develop a web application that presents your holiday photos on Google Maps.
Published: 1. May 2020 • Updated: 20. May 2021 • javascript, java, ionic, angular
This blog post shows you how to integrate hCaptcha CAPTCHAs into a plain JavaScript project and Angular projects, with a Spring Boot back end.
Published: 22. January 2022 • javascript, database, ionic
In this blog post, I will show you an example of the new live query feature in Dexie.js 3.2 that enables an application to subscribe to IndexedDB queries.
Published: 21. July 2025 • javascript
Learn how to use MapTiler's JavaScript SDK to display maps and markers in your web application, including clustering and popups.
Published: 27. March 2026 • javascript
An introduction to the Temporal API in ECMAScript 2026.
Published: 27. March 2026 • javascript
A summary of interesting smaller features in ECMAScript 2026.
Published: 9. March 2026 • javascript
Learn how to use MapLibre GL JS to embed interactive maps into web applications, including examples with markers, popups, GeoJSON data, WMS overlays, and Angular integration.