Posts tagged “JavaScript”

Visualizing large datasets on a map is not easy, you say? In this article I’ll show how to do just that in 160 lines of JavaScript using deck.gl on a Google Map, loading data from a Google Sheet.

We are going to use a large open dataset with information on power plants from all over the world, which should be interesting to visualize.

Mapbox GL JS is a JavaScript library that uses WebGL to render interactive maps from vector tiles and Mapbox styles.

In a recent update Mapbox added extended functionality to create 3D data visualizations on a map. Besides the classic fill, line and so on data layers, there is now…

Graphs and charts can be build using SVG or the DOM. But doing this by hand is quite annoying and repetitive. Luckily, there is a library to help: D3.js makes manipulating the DOM based on data easy.

For a project which is currently in development, I’d liked to record a video from the webcam data that is available through getUserMedia. That’s how I got to know the MediaRecorder API.

Recently Google released Accelerated Mobile Pages (AMP), an open source subset of HTML with performance in mind. What purpose does it serve and do we really need that?

Lately I recognized that the RAM on this server is pretty full. A bit freed up when I removed the Piwik Analytics install recently. But still, it was too full for too little stuff running.

Sometimes one doesn’t want to wait to finish for an asynchronous operation, like a fetch or calculation, to do further actions with that data. Streams are there to help with that. This will be a short introduction into Readable, Transform and Writable streams in Node.js.

ECMAScript 6, the long awaited next iteration of the JavaScript language get’s more and more browser support lately. Also in io.js a lot of the new features are supported. But Node.js is still lacking most of the features.

As I held a talk a while back about React and Flux from Facebook and the topic still pops up every now and then, I’ll write down my experiences on getting started with both. This post handles React, Flux will follow up later.

Both are very straight forward, but as they are different than other approaches, it’ll take some time (like minutes) to get used to them.

At the Hamburg JavaScript Usergroup I gave a talk on React and Flux from Facebook. I explain the concepts behind these two and point out what's so special about them.