[Javascript] file to Base64

gistfile1.txt

// with undici
const getBase64FromUrl = async (url) => {
  const response = await fetch(url)
  const arrayBuffer = await response.arrayBuffer()
  const base64 = Buffer.from(arrayBuffer)toString('base64')
  return base64
}


// without undici
const getBase64FromUrl = async (url) => {
  const data = await fetch(url);
  const blob = await data.blob();
  return new Promise((resolve) => {
    const reader = new FileReader();
    reader.readAsDataURL(blob); 
    reader.onloadend = () => {
      const base64 = reader.result;   
      resolve(base64);
    }
  });
}

// from uploaded file
const fileToBase64 = (file) => new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.readAsDataURL(file);
    reader.onload = () => resolve(reader.result);
    reader.onerror = reject;
});


getBase64FromUrl('https://i.natgeofe.com/n/4f5aaece-3300-41a4-b2a8-ed2708a0a27c/domestic-dog_thumb_square.jpg').then(console.log)