2020-fugu-image-trick

ImagePrepare.js

export function prepareImage(img) {
  return new Promise((resolve) => {
    fetch(img.src)
      .then((response) => response.blob())
      .then((blob) => {
        var reader = new FileReader();
        reader.onload = function () {
          img.src = this.result;
          resolve();
        }; // <--- `this.result` contains a base64 data URI
        reader.readAsDataURL(blob);
      });
  });
}