ico-utils/dist/helpers/binaryConverter.js

A javascript library to create ICO file from PNG images and extract PNG images from ICO file.

export function getBlob(image, mime = 'image/png') {
    return image instanceof Blob ? image : new Blob([image], { type: mime });
}
export async function getArrayBuffer(image) {
    return image instanceof ArrayBuffer ? image : await image.arrayBuffer();
}