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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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[-] vzq@lemmy.blahaj.zone 2 points 4 weeks ago

From browsing your other comments on this thread I understand that you are in a context where you can’t await, that you expect the invocation to take very little time, and that the library offers no complementary sync interface.

As far was I know you’re stuck in this case. I consider the stubborn refusal to add “resolve this promise synchronously right now” a major flaw in js.

[-] DmMacniel@feddit.de 7 points 4 weeks ago* (last edited 4 weeks ago)

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.

[-] vzq@lemmy.blahaj.zone 4 points 4 weeks ago

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.

[-] mrkeen@mastodon.social 1 points 4 weeks ago

@DmMacniel @vzq

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

No no, I think you found the language flaw.

this post was submitted on 06 Jun 2024
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