Thank you very much for your answer and this link. If I need to explain in more detail, a module is installed in the demo whose link I posted. I think that's why it needs to be opened using npm. These are the steps I took.
1- installed Node.js
2- installed Python
3- installed Git
4-I wrote this command in Node.js: C:\BlocklyProject>git clone
https://github.com/RITAccess/blockly.git5- Then I wrote this command: C:\BlocklyProject>blockly>npm install
6- I said npm run release and I got the error closure not found.
What should my next step be?
I didn't do anything different. I don't have a website or app. I only want to open this demo locally from the browser. I don't know which file to process. For example, when I am asked to import the code, I don't know where to write it. this is the situation :(