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fix(wasm): support decoding data URL in Node < v16 (backport of #8622 for v2 branch) #8668

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merged 1 commit into from
Jun 20, 2022
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fix(wasm): support decoding data URL in Node < v16 (backport of #8622 for v2 branch) #8668

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20 changes: 15 additions & 5 deletions packages/vite/src/node/plugins/wasm.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -7,11 +7,21 @@ const wasmHelperId = '/__vite-wasm-helper'
const wasmHelper = async (opts = {}, url: string) => {
let result
if (url.startsWith('data:')) {
// @ts-ignore
const binaryString = atob(url.replace(/^data:.*?base64,/, ''))
const bytes = new Uint8Array(binaryString.length)
for (let i = 0; i < binaryString.length; i++) {
bytes[i] = binaryString.charCodeAt(i)
const urlContent = url.replace(/^data:.*?base64,/, '')
let bytes
if (typeof Buffer === 'function' && typeof Buffer.from === 'function') {
bytes = Buffer.from(urlContent, 'base64')
} else if (typeof atob === 'function') {
// @ts-ignore
const binaryString = atob(urlContent)
bytes = new Uint8Array(binaryString.length)
for (let i = 0; i < binaryString.length; i++) {
bytes[i] = binaryString.charCodeAt(i)
}
} else {
throw new Error(
'Failed to decode base64-encoded data URL, Buffer and atob are not supported'
)
}
// @ts-ignore
result = await WebAssembly.instantiate(bytes, opts)
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