pt>
      if (browserSupportsAllFeatures()) {
        main();
      } else {
        loadScript('polyfills.js', main);
      }

      function main(err) {
        const myImage = document.querySelector('.my-image');

        fetch('flowers.jpg').then(function(response) {
          response.blob().then(function(myBlob) {
            let objectURL = URL.createObjectURL(myBlob);
            myImage.src = objectURL;
          });
        });
      }

      function browserSupportsAllFeatures() {
        return 