Why i cant resize image (react)

Question

I am trying to create a function that resize the images the user uploads. The user has the option to specify a new size.

The function works, and it does resize the images. However, the problem is that when I upload a 3MB image, the output becomes 55MB.

What did I do wrong?

Thanks in advance to anyone who helps. I'm already desperate!

 const [imageBlob, setImageBlob] = useState(null);

  const [isLoading, setIsLoading] = useState(false);

  const [imageDimensions, setImageDimensions] = useState({
    originalWidth: 0,
    originalHeight: 0,
    ratio: 0,
    resizedWidth: 0,
    resizedHeight: 0,
  });
  const [maintainRatio, setMaintainRatio] = useState(true);
  const [resizeImageBase64, setResizeImageBase64] = useState("");
  const [imageFormat, setImageFormat] = useState("png"); // Default format
  const [newImageName, setNewImageName] = useState("");


  const resizeImage = () => {
    setIsLoading(true);
    const canvas = document.createElement("canvas");
    const ctx = canvas.getContext("2d");

    // Create an image element from the imageBlob (Blob -> ImageElement)
    const img = new Image();

    img.onload = () => {
      // Set canvas width and height based on resized dimensions
      canvas.width = imageDimensions.resizedWidth;
      canvas.height = imageDimensions.resizedHeight;

      // Draw the image onto the canvas
      ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
      console.log(canvas.toDataURL());

      const base64String =
        `data:image/${imageFormat};base64,` +
        canvas
          .toDataURL(`image/${imageFormat}`)
          .replace("data:", "")
          .replace(/^.+,/, "");
      setResizeImageBase64(base64String);
      setIsLoading(false);
      URL.revokeObjectURL(objectURL);
    };

    img.onerror = () => {
      console.error("Failed to load image.");
    };

    // Create an object URL for the imageBlob and assign it to img.src
    const objectURL = URL.createObjectURL(imageBlob);
    img.src = objectURL;
  };