Do not know how to serialize a BigInt

[just-hello]

Describe the bug

When I use the H5Web extension on vscode and open the .h5 file, this display appears：

Here is the file I want to open:
zsim.zip

[axelboc]

Hi @just-hello, thanks for the report!

The dataset you're trying to visualise has a very complicated compound dtype made of nested compound and array fields:

None of H5Web's visualizations currently support such a complex structure. The Raw visualization therefore acts as a fallback that reads the dataset and tries to display it as a JSON string. The error you're seeing comes from the Raw visualization's attempt at converting the JS object provided by h5wasm (which includes BigInt numbers) into a JSON string.

This same error was previously reported in silx-kit/vscode-h5web#30, but in that case, the dataset was simple enough that it was supposed to be supported by the Matrix visualization. It seems that the fix in #1503 was therefore not generic enough. I think I have found a better solution—I will investigate.

Note, however, that even if the Raw visualization manages to convert the dataset to a JSON string, it will likely be too big to display and your only option will be to download it as a JSON file via the toolbar (cf. screenshot below). Will this behaviour be satisfactory to you?

[just-hello]

Thank you for the explanation. A download option for JSON data would be fine.