场景

2023年03月23日

柏拉文

越努力，越幸运

一、Base64 To Blob

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 function dataUrlToBlob(base64, mimeType) {
    const reg = /^data:(.*);base64.*/;
    mimeType = mimeType || reg.exec(base64)?.[1] || "";
    let bytes = window.atob(base64.split(",")[1]);
    let ab = new ArrayBuffer(bytes.length);
    let ia = new Uint8Array(ab);
    for (let i = 0; i < bytes.length; i++) {
        ia[i] = bytes.charCodeAt(i);
    }
    return new Blob([ab], { type: mimeType });
}