is there any tool to make the conversion? thanks!

Why, yes! There actually is!

Forum topic here

https://github.com/NitroCipher/ext2to3

Current project: [s3Blocks: scratchblocks rewritten for Scratch 3.0] ::#4b4a60 //https://scratch.mit.edu/discuss/topic/290031/ Basically done!

NitroCipher wrote:

Why, yes! There actually is!

Forum topic here

https://github.com/NitroCipher/ext2to3

thanks for your help!

when using this link https://sheeptester.github.io/scratch-gui/ to concvert extension, below chrome console errors happened:

shared-dispatch.js:137 Uncaught (in promise) DOMException: Failed to execute ‘postMessage’ on ‘DedicatedWorkerGlobalScope’: DOMException object could not be cloned.
at https://sheeptester.github.io/scratch-gui/extension-worker.js:996:20
at new Promise (<anonymous>)
at WorkerDispatch._remoteTransferCall (https://sheeptester.github.io/scratch-gui/extension-worker.js:979:14)
at WorkerDispatch.transferCall (https://sheeptester.github.io/scratch-gui/extension-worker.js:918:45)
at WorkerDispatch.call (https://sheeptester.github.io/scratch-gui/extension-worker.js:886:32)
at https://sheeptester.github.io/scratch-gui/extension-worker.js:146:20

Do you know what's the reason of the error?

gosafer wrote:

NitroCipher wrote:

Why, yes! There actually is!

Forum topic here

https://github.com/NitroCipher/ext2to3

thanks for your help!

when using this link https://sheeptester.github.io/scratch-gui/ to concvert extension, below chrome console errors happened:

shared-dispatch.js:137 Uncaught (in promise) DOMException: Failed to execute ‘postMessage’ on ‘DedicatedWorkerGlobalScope’: DOMException object could not be cloned.
at https://sheeptester.github.io/scratch-gui/extension-worker.js:996:20
at new Promise (<anonymous>)
at WorkerDispatch._remoteTransferCall (https://sheeptester.github.io/scratch-gui/extension-worker.js:979:14)
at WorkerDispatch.transferCall (https://sheeptester.github.io/scratch-gui/extension-worker.js:918:45)
at WorkerDispatch.call (https://sheeptester.github.io/scratch-gui/extension-worker.js:886:32)
at https://sheeptester.github.io/scratch-gui/extension-worker.js:146:20

Do you know what's the reason of the error?

where is the 3.0 extension you are hosting?

your url should look something like https://sheeptester.github.io/scratch-gui/?url=https://sheeptester.github.io/javascripts/utilities.js or https://sheeptester.github.io/scratch-gui/?url=https://nitrocipher.github.io/ext2to3/ext-test.js

Current project: [s3Blocks: scratchblocks rewritten for Scratch 3.0] ::#4b4a60 //https://scratch.mit.edu/discuss/topic/290031/ Basically done!

NitroCipher wrote:

gosafer wrote:

NitroCipher wrote:

Why, yes! There actually is!

Forum topic here

https://github.com/NitroCipher/ext2to3

thanks for your help!

when using this link https://sheeptester.github.io/scratch-gui/ to concvert extension, below chrome console errors happened:

shared-dispatch.js:137 Uncaught (in promise) DOMException: Failed to execute ‘postMessage’ on ‘DedicatedWorkerGlobalScope’: DOMException object could not be cloned.
at https://sheeptester.github.io/scratch-gui/extension-worker.js:996:20
at new Promise (<anonymous>)
at WorkerDispatch._remoteTransferCall (https://sheeptester.github.io/scratch-gui/extension-worker.js:979:14)
at WorkerDispatch.transferCall (https://sheeptester.github.io/scratch-gui/extension-worker.js:918:45)
at WorkerDispatch.call (https://sheeptester.github.io/scratch-gui/extension-worker.js:886:32)
at https://sheeptester.github.io/scratch-gui/extension-worker.js:146:20

Do you know what's the reason of the error?

where is the 3.0 extension you are hosting?

your url should look something like https://sheeptester.github.io/scratch-gui/?url=https://sheeptester.github.io/javascripts/utilities.js or https://sheeptester.github.io/scratch-gui/?url=https://nitrocipher.github.io/ext2to3/ext-test.js

Great thanks! It's ok now. I've just tried the js file converted from scratchx to s3, maybe there is some problem in the converted file, so the error happend. I tested your utilities.js file, it's ok.

gosafer wrote:

NitroCipher wrote:

gosafer wrote:

NitroCipher wrote:

Why, yes! There actually is!

Forum topic here

https://github.com/NitroCipher/ext2to3

thanks for your help!

when using this link https://sheeptester.github.io/scratch-gui/ to concvert extension, below chrome console errors happened:

shared-dispatch.js:137 Uncaught (in promise) DOMException: Failed to execute ‘postMessage’ on ‘DedicatedWorkerGlobalScope’: DOMException object could not be cloned.
at https://sheeptester.github.io/scratch-gui/extension-worker.js:996:20
at new Promise (<anonymous>)
at WorkerDispatch._remoteTransferCall (https://sheeptester.github.io/scratch-gui/extension-worker.js:979:14)
at WorkerDispatch.transferCall (https://sheeptester.github.io/scratch-gui/extension-worker.js:918:45)
at WorkerDispatch.call (https://sheeptester.github.io/scratch-gui/extension-worker.js:886:32)
at https://sheeptester.github.io/scratch-gui/extension-worker.js:146:20

Do you know what's the reason of the error?

where is the 3.0 extension you are hosting?

your url should look something like https://sheeptester.github.io/scratch-gui/?url=https://sheeptester.github.io/javascripts/utilities.js or https://sheeptester.github.io/scratch-gui/?url=https://nitrocipher.github.io/ext2to3/ext-test.js

Great thanks! It's ok now. I've just tried the js file converted from scratchx to s3, maybe there is some problem in the converted file, so the error happend. I tested your utilities.js file, it's ok.

By the way, how to run this file? https://github.com/NitroCipher/ext2to3/blob/master/ext2to3.user.js
I've tried “node ext2to3.user.js”, there is error.

NitroCipher wrote:

gosafer wrote:

NitroCipher wrote:

Why, yes! There actually is!

Forum topic here

https://github.com/NitroCipher/ext2to3

thanks for your help!

when using this link https://sheeptester.github.io/scratch-gui/ to concvert extension, below chrome console errors happened:

shared-dispatch.js:137 Uncaught (in promise) DOMException: Failed to execute ‘postMessage’ on ‘DedicatedWorkerGlobalScope’: DOMException object could not be cloned.
at https://sheeptester.github.io/scratch-gui/extension-worker.js:996:20
at new Promise (<anonymous>)
at WorkerDispatch._remoteTransferCall (https://sheeptester.github.io/scratch-gui/extension-worker.js:979:14)
at WorkerDispatch.transferCall (https://sheeptester.github.io/scratch-gui/extension-worker.js:918:45)
at WorkerDispatch.call (https://sheeptester.github.io/scratch-gui/extension-worker.js:886:32)
at https://sheeptester.github.io/scratch-gui/extension-worker.js:146:20

Do you know what's the reason of the error?

where is the 3.0 extension you are hosting?

your url should look something like https://sheeptester.github.io/scratch-gui/?url=https://sheeptester.github.io/javascripts/utilities.js or https://sheeptester.github.io/scratch-gui/?url=https://nitrocipher.github.io/ext2to3/ext-test.js

By the way, how to run this file? https://github.com/NitroCipher/ext2to3/blob/master/ext2to3.user.js
I've tried “node ext2to3.user.js”, there is error.

It's a userscript, which I believe as per the browser extension policy can't be shared on Scratch. They need a special browser extension that I cannot specifically name because of this policy.

When you get the userscript working, go to https://scratch.mit.edu/convert/?url=EXTENSION-URL-HERE, and it'll take the extension contents and perform some magic. When it's done, a button labelled “Download XYZ as a 3.0 extension file” will appear and it downloads a JS file containing the converted extension upon clicking.

Sheep_maker wrote:

It's a userscript, which I believe as per the browser extension policy can't be shared on Scratch. They need a special browser extension that I cannot specifically name because of this policy.

When you get the userscript working, go to https://scratch.mit.edu/convert/?url=EXTENSION-URL-HERE, and it'll take the extension contents and perform some magic. When it's done, a button labelled “Download XYZ as a 3.0 extension file” will appear and it downloads a JS file containing the converted extension upon clicking.

The convert link can't be opened. I've tested below links.
https://scratch.mit.edu/convert/?url=https://github.com/NitroCipher/ext2to3/blob/master/ext2to3.user.js
https://scratch.mit.edu/convert/?url=https://raw.githubusercontent.com/LiFaytheGoblin/ScratchX-Extensions/b88f854585d9cfb3a1aeb7f52d792c734ec25da3/CatX.js
https://scratch.mit.edu/convert/?url=https://raw.githubusercontent.com/iRobotSTEM/CreateScratchX/gh-pages/roomba600Extension.js

Seems the convert service is closed?

gosafer, if you're getting a 404, you need to install the userscript first. The userscript modifies the content of that page.

Sheep_maker wrote:

gosafer, if you're getting a 404, you need to install the userscript first. The userscript modifies the content of that page.

it's not 404…
I dont' quite understand how to install that userscript file
Would you please give some help? Thanks!
By the way, I need to convert from scratchx extension (not s2 extension) to s3 extension.

gosafer wrote:

Sheep_maker wrote:

gosafer, if you're getting a 404, you need to install the userscript first. The userscript modifies the content of that page.

it's not 404…
I dont' quite understand how to install that userscript file
Would you please give some help? Thanks!
By the way, I need to convert from scratchx extension (not s2 extension) to s3 extension.

As we've said, we're not allowed to really talk about userscripts due to a “browser extension” policy by the Scratch Team, which is supposed to stop people from getting viruses (even though there hasn't been an incident where this has happened through Scratch via a userscript ever).

But you should get some results if you look up “browser userscript” on the internet.

Additionally that link will be a 404 error unless you install the userscript, so you might have the userscript installed already.

dude341 wrote:

gosafer wrote:

Sheep_maker wrote:

gosafer, if you're getting a 404, you need to install the userscript first. The userscript modifies the content of that page.

it's not 404…
I dont' quite understand how to install that userscript file
Would you please give some help? Thanks!
By the way, I need to convert from scratchx extension (not s2 extension) to s3 extension.

As we've said, we're not allowed to really talk about userscripts due to a “browser extension” policy by the Scratch Team, which is supposed to stop people from getting viruses (even though there hasn't been an incident where this has happened through Scratch via a userscript ever).

But you should get some results if you look up “browser userscript” on the internet.

Additionally that link will be a 404 error unless you install the userscript, so you might have the userscript installed already.

As far as I'm aware, the extension policy was on Scratcher made userscripts and extensions, not already established extensions. So if I'm correct (and I'm probably not) the crime here has already been committed (linking the userscript) and I should be able to say the following.

To install a userscript you need:
Tampermonkey for Chrome
Greasemonkey for Firefox

got it , thanks all!