HTML5 Doctor

We’ve already had a glimpse at Server-Sent Events (also known as EventSource†, and I’ll switch between the two to keep you on your toes) in my Methods of Communication article from last year. In this article, I want to delve in to more detail about the SSE API, demonstrate its features, and even show you how to polyfill browsers that lack EventSource support.

For some time now, we’ve been using various technologies to edit and store text within a web browser. Now with the contenteditable attribute, things have got a whole lot easier. In this article, I’ll tell you what this attribute is for, how it works, and how we can take things further.

First, let’s check out the spec:

Across the web, you’ll see a range of sites that feature calculators for working out things like loan repayments, mortgage rates, tax, insurance, and more. Until now, we’ve had no way of semantically marking up the result of those calculations. Enter: the <output> element! In this article, we’ll show you <output> and some related JavaScript tricks. Let’s get cracking.