Creating extensions for Scratch 3.0

zachary123212

Well, after an exhausting amount of backtracking, I've managed to get the new version of scratch to add a local extension, but still can't figure out how to get it to work with URLs. What I've done is this (say you want to add an extension named X):

fork, clone, and link the scratch-vm and scratch-gui repos
in scratch-vm/src/extensions add a directory called X, containing your extension's index.js file, and any relevant assets
in scratch-vm/src/extension-support/extension-manager.js, near the top of the file, add the line:
const Scratch3XBlocks = require('../extensions/X');
a bit further down, at the end of const builtinExtensions, add the line (with the requisite comma preceding it):
X: Scratch3XBlocks
go to scratch-gui/src/lib/libraries/extensions/index.jsx and add an entry with X as extensionId

Does anyone know how to pass in a remote URL directly in index.jsx, so I don't need to repeat steps 1-4?

A48c

discoverypark wrote:
How about if you could make your own extensions? (in scratch 3.0)

You can.

Hello, I'm a employee of the The Speed-Shop…

kyleplo

Try this: https://github.com/kyleplo/scratch-three-extension-docs/wiki/Getting-Started

yleplo
#bring-it-back
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LuckyLucky7

kyleplo wrote:
Try this: https://github.com/kyleplo/scratch-three-extension-docs/wiki/Getting-Started

Seems pretty neat. Maybe I can experiment with this and probably add this to my mod.

I have about 3450 posts, 90 shared projects, 180 total created/followed topics, and 425 followers.

Sheep_maker

I've modified scratch-gui and added a button in the extensions library that loads extensions from a URL.

Most of the functionality seems to have already been put in place; they just haven't added a button for it yet.

Because of how extensions are registered, external extensions don't have access to the magical “runtime” thing which means you can't do much with the default Scratch unlike the currently provided extensions. Maybe I'll find a way to change that.

I made an extension with a few reporter blocks here.

Edit: updated URL because the builder was being disobedient.

Last edited by Sheep_maker (July 10, 2018 11:58:28)

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LuckyLucky7

Sheep_maker wrote:
I've modified scratch-gui and added a button in the extensions library that loads extensions from a URL.

Most of the functionality seems to have already been put in place; they just haven't added a button for it yet.

Because of how extensions are registered, external extensions don't have access to the magical “runtime” thing which means you can't do much with the default Scratch unlike the currently provided extensions. Maybe I'll find a way to change that.

I made an extension with a few reporter blocks here.

Looks like I'll use this extension to test out the blocks for my Lucky7 Mod.

I have about 3450 posts, 90 shared projects, 180 total created/followed topics, and 425 followers.

dalelane

Sheep_maker wrote:
I've modified scratch-gui and added a button in the extensions library that loads extensions from a URL.

Thanks so much for sharing this. This (and this issue in particular) looks like it'll be exactly what I need to try and port my Scratchx work over to Scratch 3. Looking forward to giving it a try :-)

OnMax

Hello there.
Thanks for creating this topic, it was really helpful!
I'm now working on the “Firebase Database Extension”. It is a Google's realtime Database. I need first ask for Google's permission and then I'll start working. Here are some blocks for extensions:

add value key [name] value [Alex]::pen

(get value key [name]::pen) 

get all keys to list [my list v] ::pen

push value from list [my list v] ::pen

Thanks again

… i guess, i just do something here

OnMax

Please, help!

I need help with this extension ! I wrote simple alert display extension and I used Sheep_maker's scratch guitar with load URL. What wrong with it? Please help!!!

… i guess, i just do something here

Sheep_maker

OnMax wrote:
Please, help!

I need help with this extension ! I wrote simple alert display extension and I used Sheep_maker's scratch guitar with load URL. What wrong with it? Please help!!!

It's Scratch.BlockType.STRING, not Scratch.blockType.STRING

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OnMax

Sheep_maker wrote:
OnMax wrote:
Please, help!

I need help with this extension ! I wrote simple alert display extension and I used Sheep_maker's scratch guitar with load URL. What wrong with it? Please help!!!
It's Scratch.BlockType.STRING, not Scratch.blockType.STRING

Thanks a lot! I often make mistakes in JavaScript with register

… i guess, i just do something here

OnMax

Sheep_maker wrote:
OnMax wrote:
Please, help!

I need help with this extension ! I wrote simple alert display extension and I used Sheep_maker's scratch guitar with load URL. What wrong with it? Please help!!!
It's Scratch.BlockType.STRING, not Scratch.blockType.STRING

I now know where's the error. There must be not blockType. There must be ArgumentType. Thanks everyone

… i guess, i just do something here

OnMax

Hi, guys.

I started working with TextToSpeech extension that uses that code:

window.speechSynthesis.speak();

Last edited by OnMax (Aug. 1, 2018 14:21:41)

… i guess, i just do something here

OnMax

NOW I REALLY NEED HELP!

Guys, please tell me, what's wrong with this extension?

Actually, it works fine and all the reporters and basic functions are working. But I wrote…

44 speechsay({TEXT}) {
45 sayedtxt = TEXT;
46 var msg = new SpeechSynthesisUtterance(TEXT);
47 window.speechSynthesis.speak(msg);
48 }

…and the speech command (47) doesn't works!

Please tell me, what's wrong with this, because everything works fine, exept of the speech.

P.S: Also, the speech script works in the simple HTML page, but not in the Scratch 3.0 GUI with url button.

Last edited by OnMax (Aug. 1, 2018 14:22:34)

… i guess, i just do something here

Sheep_maker

OnMax wrote:
Hi, guys.

I started working with TextToSpeech extension that uses that code:

window.speechSynthesis.speak();

Extensions are run in their own worker; window does not exist in workers, they use self.

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OnMax

Sheep_maker wrote:
OnMax wrote:
Hi, guys.

I started working with TextToSpeech extension that uses that code:

window.speechSynthesis.speak();

Extensions are run in their own worker; window does not exist in workers, they use self.

Do you mean, I can just use self instead of window?

… i guess, i just do something here

PullJosh

OnMax wrote:
Sheep_maker wrote:
OnMax wrote:
Hi, guys.

I started working with TextToSpeech extension that uses that code:

window.speechSynthesis.speak();

Extensions are run in their own worker; window does not exist in workers, they use self.
Do you mean, I can just use self instead of window?

Haven't tested myself, but it looks like yes.

Convert your Scratch projects to JavaScript automatically with Leopard!

OnMax

PullJosh wrote:
OnMax wrote:
Sheep_maker wrote:
OnMax wrote:
Hi, guys.

I started working with TextToSpeech extension that uses that code:

window.speechSynthesis.speak();

Extensions are run in their own worker; window does not exist in workers, they use self.
Do you mean, I can just use self instead of window?
Haven't tested myself, but it looks like yes.

Thanks, PullJosh. I'll try it

… i guess, i just do something here

OnMax

PullJosh wrote:
OnMax wrote:
Do you mean, I can just use self instead of window?
Haven't tested myself, but it looks like yes.

It doesn't works. It just still doesn't works…

link - js file

… i guess, i just do something here

SimpleScratch

@Sheep_maker

Thanks for your Scratch3 mod with your external extension loader

One “small” issue I'm having with it is that I can't seem to re-load projects that use your utilities extension
(Its just sits there giving an endless series of messages about loading the file/sprites/extensions etc)

Is this just happening to me or is it a general issue?

Simon

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