Question 51124 in Javascript Question posted in
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Argument of type 'Uint8Array' is not assignable to parameter of type 'number[]' – Javascript

Based on crypto.subtle.exportKey("spki", cryptoKey) I want to convert the returned ArrayBuffer into a string so I can turn it into a base64 string. Based on the documentation I tried

const bufferAsString = String.fromCharCode.apply(null, new Uint8Array(buffer));

but TypeScript tells me

TS2345: Argument of type ‘Uint8Array’ is not assignable to parameter of type ‘number[]’.

How can I fix the type errors?

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2

Answers


  1. 0

    You could use spread syntax or Array.from to convert the Uint8Array to a regular array.

    String.fromCharCode.apply(null, [...new Uint8Array(buffer)]);
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  2. 0

    Use parameters spread when you call the function instead of using apply (playground):

    String.fromCharCode(...new Uint8Array(buf));
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