How to hide advanced blocks in custom extensions?

[kx1xixit]

I'm developing a custom Scratch extension. I know there's a bunch of Scratch APIs that I have never seen before (like the Scratch.download API), and I could only imagine there's some sort of API to mark some blocks in my custom extension as "advanced". If not, there has to be some kind of pattern that experienced developers like SharkPool use to do so.

How should I go about hiding advanced blocks in my custom extension and having a button that shows/hides them, preferably storing the value on whether or not said blocks are hidden in the project?

[Brackets-Coder]

In your extension class, create a constructor object/variable that stores whether the section(s) is/are hidden. Then create a block with type Scratch.BlockType.BUTTON and set its function to toggle that value. By toggling hideFromPallet via a variable/object and then calling Scratch.vm.extensionManager.refreshBlocks you can get the effect you're looking for.

Take a look at this commit for an example; I think I adapted that code from @SharkPool-SP or someone else though so don't credit me for it