javascript-binary-converter/build/esm/utils/blob.js

A utility package to quickly handle and convert various Javascript binary objects

import { isNode } from "./crossPlatform";
export function blobToBase64(blob, config = { appendDataUrl: false }) {
    if (isNode) {
        return blobToBase64_Node(blob);
    }
    return new Promise((resolve) => {
        const reader = new FileReader();
        reader.readAsDataURL(blob);
        reader.onloadend = () => {
            const dataUrl = reader.result;
            resolve(config?.appendDataUrl ? dataUrl : dataUrl.split(',')[1]);
        };
    });
}
async function blobToBase64_Node(blob) {
    const arrayBuffer = await blob.arrayBuffer();
    const uint8 = new Uint8Array(arrayBuffer);
    return Buffer.from(uint8).toString('base64'); //TODO: this might be problematic. Explore a different solution.
}
export async function blobToCanvas(blob) {
    var canvas = document.createElement('canvas');
    var ctx = canvas.getContext('2d');
    var img = new Image();
    img.src = URL.createObjectURL(blob);
    await new Promise((res) => img.onload = res);
    canvas.height = img.height;
    canvas.width = img.width;
    ctx.drawImage(img, 0, 0, img.width, img.height);
    return canvas;
}
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