The 2019 update to the MakeCode editor ( contains a number of new features and bug fixes that we'd like you to test.


Functions with parameters

You can now pass parameters to functions. This example passes two numbers as parameters and then displays them on the LED display.

Green Screen

The green screen lets you use your web camera or a green screen as the background to the workspace. Using screencapture software, this allows you to record demonstrations or tutorials in the editor. It can be enabled in the settings menu.

Script Manager

The home screen now includes the ability to search for, duplicate, delete and list your projects. Handy if you have lots of projects saved in the browser.

UTF8 character support in strings

Updated servo blocks

 The blocks in the Servo extension have been improved  to help you calibrate and better control your servo motors

Updated radio receive blocks

Previously if you renamed the values in Radio Received blocks the data types  would not change; ie string remained string and number remained number. 

To resolve this, we are now using fixed names for the received values – so they will not show up in the Variables Toolbox drawer and you will not be able to rename them.

Convert to String

The Convert to String block can take numbers and Boolean values and convert them into Strings.

Updated docs

Garbage Collector

A ‘Garbage collector’ has been introduced to improve memory usage. From MDN  “High-level languages embed a piece of software called "garbage collector" whose job is to track memory allocation and use in order to find when a piece of allocated memory is not needed any longer in which case, it will automatically free it”.