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TrevorSundberg/download.js

Last active October 30, 2022 19:55
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Download a file in JavaScript with Emscripten / WebAssembly.
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download.js
function download(filenamePtr, dataPtr, size) {
const a = document.createElement('a')
a.style = 'display:none'
document.body.appendChild(a)
const view = new Uint8Array(Module.HEAPU8.buffer, dataPtr, size)
const blob = new Blob([view], {
type: 'octet/stream'
})
const url = window.URL.createObjectURL(blob)
a.href = url
const filename = UTF8ToString(filenamePtr)
a.download = filename
a.click()
window.URL.revokeObjectURL(url)
document.body.removeChild(a)
}
window.download = download
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