What are these blocks, and how do I get them?

[Bilangus]

Its from the Javascript extras extension by WoofWoof.

Making an extension for every JavaScript exclusive feature I can think of!

WoofWoofCodes/pxt-javascript-extras Basically what I want to make is an extension for all those single-line functions that are only accessible in javaScript. This is going to be a running project that I’ll update over time, as I discover javaScript exclusive features. If you find a function in javaScript you would like added, just post it here or create a pull request on the GitHub page. If you do it correctly, with a small description attached to your blocks implementation and everything, maki…