ReactJS: Argument of type unknown is not assignable to parameter of type SetStateAction<string> from filereader

Question

I want to why my code is not working and causing me this error Argument of type 'unknown' is not assignable to parameter of type 'SetStateAction<string>'. Type 'unknown' is not assignable to type '(prevState: string) => string'.ts(2345).

This error is from this code setBaseImage(base64); of this function:

 const uploadImage = async (e: any) => { const file = e.target.files[0]; const base64 = await convertBase64(file); setBaseImage(base64); };

Current code:

 const [baseImage, setBaseImage] = useState(""); const convertBase64 = (file: any) => { return new Promise((resolve, reject) => { const fileReader = new FileReader(); fileReader.readAsDataURL(file); fileReader.onload = () => { resolve(fileReader.result); }; fileReader.onerror = (error) => { reject(error); }; }); };

I just follow this tutorial source of the code

Asdf1234567 · Accepted Answer · 2022-01-11 18:26:00Z

4

Already solve the issue by updating this line of code:

setBaseImage(String(base64));

answered Jan 11, 2022 at 18:26

Asdf1234567

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