Transcrypt | Hyperledger Blockchain based platform to verify | Blockchain library

import declarations may only appear at top level of a module

is fairly clear: You're not loading the script as a module, so you can't use import. Add type="module" to the script tag. (But be sure that your target browsers support modules -- all modern major ones do, but you don't have to go more than a few versions back in some before module support isn't there.)

missing { before try block

You have

You cannot do this. IE does not understand the type="module" attribute.

Instead use rollup.js and Babel to bundle your module into an old style script mystuff_incl_ie.js and load this with the normal script tag:

The full standard library has not been ported to Transcrypt yet, the json library included. In most cases you can get around this by using a JavaScript equivalent library to support whatever you are trying to accomplish, and they can be called directly from your Python code. But Transcrypt doesn't automatically do this library mapping for you, so you'll have to explicitly import the JavaScript library to use it.

Since Python dictionaries are converted to JavaScript objects with Transcrypt, you may be able to just use the JSON data as-is. Otherwise you can call the built-in JSON.parse() and JSON.stringify() directly with no imports necessary.

You use very, very strange method to create string.

You don't need to use print() to keep it as string in variable - so you don't need io.String()

More popular is to keep all strings on list and later join them using "\n"

I don't believe Transcrypt has the Python urllib library available. You will need to use a corresponding JavaScript library instead. I prefer axios, but you can also just use the built in XMLHttpRequest() or window.fetch()

Here is a Python function you can incorporate that uses window.fetch():

Some things you could try.

1. Make sure it is html 5 by adding to your index.html

2. Instead of loading the file directly from the system using file://... you can use the WebViewAssetLoader this will return the mimetype https://developer.android.com/reference/kotlin/androidx/webkit/WebViewAssetLoader

3. If that does not work inside the webViewClient you could intercept the request and add the text/javascript mimetype manually:

Line 20 should be replaced, obviously within script tags, by:

You've probably run into a security policy of Chrome called CORS. Start a webserver from the directory where your html file is, using python -m http.server, and browse to localhost:8000. In your browser window, click on the html file and things should work.

OK, I finally found out myself what went wrong. In case you get that error most probably Java is not installed on your machine which is needed to minify the javascript code which transcrypt seems to try by default. So just invoke the command: