How to save a png from javascript variable

user_293995 0
Viewed 36905

I have an image encoded in base64 in a javascript variable : data:image/png;base64, base64 data

[EDIT] I need to save that file to disk without asking to the visitor to do a right click [/EDIT]

Is it possible ? How ?

Thanks in advance

Best regards

save image javascript
10 Answers

The accepted solution seems to have a limitation for large data. If you're running into this (instead of the downloaded file's name, I see "download" and "Failed - Network error" in Chrome), here's what I did in order to download a 2mb file:

const blob = await (await fetch(document.getElementById('canvasID').toDataURL())).blob();
const file = new File([blob], {type:"image/png", lastModified: new Date()});
var a = document.createElement('a');
a.href = window.URL.createObjectURL(file);
a.download = 'image.png';
a.click();
user_49466810
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