How can you encode a string to Base64 in JavaScript?

Question

I have a PHP script that can encode a PNG image to a Base64 string.

I\'d like to do the same thing using JavaScript. I know how to open files, but I\'m not sure how

Answer 1

You can use btoa()/atob() in browser, but some improvements required, as described here https://base64tool.com/uncaught-domexception-btoa-on-window/ and there https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/btoa for UTF strings support!