Base64 Encoding with JavaScript
Question:
Need assistance encoding a PNG image to a Base64 string using JavaScript. I know how to open files but am unfamiliar with binary data encoding.
Answer:
Utilizing btoa() and atob()
JavaScript offers the btoa() and atob() functions for converting from and to Base64 encoding.
btoa() Function
btoa() accepts a "string" representing an 8-bit byte array. Passing strings containing characters exceeding 8 bits may cause malfunction. If you're working with text, you'll need to encode it beforehand.
atob() Function
atob() returns a "string" with each character representing an 8-bit byte. This does not imply ASCII; it assumes binary data handling.
Additional Resources
- How to load binary image data using JavaScript and XMLHttpRequest?
Browser Support
Both btoa() and atob() have wide browser support. Consult the following links for specific compatibility information:
- https://caniuse.com/?search=atob
- https://caniuse.com/?search=btoa
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