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I have the string type of QR code, like this:

"data:image/png;base64,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"

I am not sure how to display the QR code in React from this string type.

Dharman
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Julius0505
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2 Answers2

4

Just use an img tag like the below:


let img =
  'data:image/png;base64,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';

<img src={img}/>

enter image description here

Jamal
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1

if the Qr_code will change every time you can use like this:

 <img    src={`data:image/png;base64,${qr_code}`}/>

the qr_code is the value that changes every time so you can every time generate a new QRcode

Belaid BOUAOUALTEN
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  • How to get back the octet stream string in a variable ? Doing a `console.log(data)` on the `finally` clause of the `fetch` displays in console an empty Array (size : 0). Is it because the response's payload is an octet stream and not JSON ? How to solve it ? Thanks a lot. – Brice Joosten Jun 27 '22 at 09:54