Thanks @Beliavsky for the feedback. All the examples work with the default LLVM backend, so it means they are not yet implemented in the WebAssembly backend that Ubaid is working on. He will implement the missing features pretty soon.
Btw, if you click on the AST or ASR tabs, you will see that your examples will load there correctly (WAT will fail).
The last one is not yet supported, so I opened up an issue: `10*[1,2]` fails (#716) · Issues · lfortran / lfortran · GitLab (it will work in the AST tab, but not ASR or WAT).