base64转blob

export function base64ToBlob(code) {
let parts = code.split(';base64,')
let contentType = parts[0].split(':')[1]
let raw = window.atob(parts[1])
let rawLength = raw.length

let uInt8Array = new Uint8Array(rawLength)

for (let i = 0; i < rawLength; ++i) {
uInt8Array[i] = raw.charCodeAt(i)
}
return new Blob([uInt8Array], { type: contentType })
}
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