Warning: This blog post is outdated. Instead, read chapter “Modules” in “JavaScript for impatient programmers”. At the end of July 2014, TC39 [1] had another meeting, during which the last details of the ECMAScript 6 (ES6) module syntax were finalized. This blog post gives an overview of the complete ES6 module system. Module systems for current JavaScript  # JavaScript does not have built-in supp

On February 1, 2015, I held the 90 minute talk “Using ECMAScript 6 today” at the Rolling Scopes Conference in Minsk. A video recording of that talk is online: Part 1 [40:44] Part 2 [53:04] Slides

Update 2012-01-29: The post “What is {} + {} in JavaScript?” looks at the addition operator in more detail. This post describes how to do a limited version of operator overloading in JavaScript. With the technique described here, you’ll be able to implement a type StringBuilder that can be used as follows: var sb = new StringBuilder(); sb << add("abc") << add("def"); And a type Point that can be u

Bookmarklets are little plugins for your browsers: JavaScript programs packed into javascript: URLs that you add to your bookmarks and start by clicking on them. They perform an operation on the currently open web page such as submitting it to Twitter. There are even bookmarklets that transform the current web page, for example, to add icons that, when clicked, add an event to Google Calendar. A s