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Why is crypto.subtle.digest async? (programming.dev)

submitted 5 months ago by [email protected] to c/[email protected]

16 comments fedilink hide all child comments

Why is crypto.subtle.digest designed to return a promise?

Every other system I've ever worked with has the signature hash(bytes) => bytes, yet whatever committee designed the Subtle Crypto API decided that the browser version should return a promise. Why? I've looked around but I've never found any discussion on the motivation behind that.

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[–] [email protected] 6 points 5 months ago* (last edited 5 months ago) (2 children)

Given the nature of JS running only on a single thread. Promises/asynchronity is the only way to keep the browser from locking up.

Thus insisting on any other way is a major flaw in the developer not the language.

[–] [email protected] 5 points 5 months ago (1 children)

Thus insisting on any other way is a major flaw in the developer not the language.

I mean, I understand the idea, but this is a pretty asshole way to frame it. I don’t think I deserve that, and certainly OP doesn’t deserve that.

[–] [email protected] 2 points 5 months ago

@DmMacniel @vzq

> Given the nature of JS running only on a single thread.

No no, I think you found the language flaw.