Created
January 20, 2022 13:15
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Convert base64 string to Uint8Array (one liner)
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| /** | |
| * One liner to convert a base64 string to a binary Uint8Array | |
| * | |
| * Example: | |
| * const dataURL = 'data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2w....'; | |
| * console.log(convertDataURIToBinary(dataURL)); | |
| */ | |
| const convertDataURIToBinary = dataURI => | |
| Uint8Array.from(window.atob(dataURI.replace(/^data[^,]+,/,'')), v => v.charCodeAt(0)); |
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Thanks for writing this alternative @av01d. I was about to switch from https://gist.github.com/borismus/1032746 to this but luckily ran some benchmarks first. For my use case (95MB 40min MP3 file under Firefox 100) this one-liner took 8.45X longer (8751ms vs 1034ms). Same test on Chromium 101, this function was 7.78X longer (12301ms vs 1579ms).
I may have a tinker at some point to optimise speed further but ~1 second is acceptable. Maybe the regex is slowing it down but I feel like the for loop in the original helps to keep the UI responsive too.