File System Access API: how to send a fileHandle with postMessage?

Question

I'm working with the File System Access API and I have to send a FileSystemDirectoryHandle calling a postMessage(), according to this article it seems to be possible

File handles are serializable, which means that you can save a file handle to IndexedDB, or call postMessage() to send them between the same top-level origin.

I made many try but... noway

In this question @DenverCoder9 proposes a working example for the indexedDb but I can't find anything for the postMessage

Thanks, Davide

DenverCoder9 · Accepted Answer · 2021-05-01 14:36:57Z

0

According to this fixed bug transferring file handles via postMessage() is implemented and should work, however, only for same-origin contexts. If it doesn’t work, probably your origins are different.

edited May 1, 2021 at 14:36

answered Apr 29, 2021 at 23:01

DenverCoder9

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Vivadave Over a year ago

Ok, thank you, but just a question, the structured cloning algorithm is also used in indexedDb, do you know why it works in that case?

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