FileReader: readAsBinaryString() method

readAsBinaryString(blob)

const canvas = document.createElement("canvas");
const height = 200;
const width = 200;
canvas.width = width;
canvas.height = height;
const ctx = canvas.getContext("2d");
ctx.strokeStyle = "#009900";
ctx.beginPath();
ctx.arc(width / 2, height / 2, width / 2 - width / 10, 0, Math.PI * 2);
ctx.stroke();
canvas.toBlob((blob) => {
  const reader = new FileReader();
  reader.onload = () => {
    console.log(reader.result);
  };
  reader.readAsBinaryString(blob);
});