imagekit-react-hook

This is a simple hook wrapper around the ImageKit.io javascript library. It allows for easy usage of client-side uploads, as well as generating signed URLs for private images.

This is a straight-forward, non-opinionated wrapper, so the original ImageKit.io documentation should be referred to for method usage.

Usage

To use, simply wrap the components you wish to use the useImageKit hook with the included ImageKitProvider. You must provide the urlEndpoint, authenticationEndpoint, and publicKey properties.

This example uses NextJS and loads the settings from environment variables, but any framework based on React should be similar:

import { ImageKitProvider } from '@/providers/ImageKitProvider';

const PhotosPage = () => {
  const [origin, setOrigin] = useState<string>();

  /* our authentication end point is on the same server */
  useEffect(() => setOrigin(window.location.origin), []);

  return (
    <ImageKitProvider
      urlEndpoint={process.env.NEXT_PUBLIC_IMAGEKIT_URL_ENDPOINT!}
      authenticationEndpoint={`${origin}/api/auth/photo`}
      publicKey={process.env.NEXT_PUBLIC_IMAGEKIT_PUBLIC_KEY}
    >
      <child-components />
    </ImageKitProvider>
  );
};

export default PhotosPage;

Child components within ImageKitProvider can access the ImageKitContext via the useImageKit hook.

This example shows how you could upload a single profile image that a user selected via an Input element:

import { v4 as uuidV4 } from 'uuid';
import { useImageKit } from 'imagekit-react-hook';

const { upload, url } = useImageKit();

/* attach to the onChange event of the input element */
const onChange = async (event: ChangeEvent<HTMLInputElement>) => {
  if (!event.target.files)
    throw new Error('File list is null after selecting a file!');

  const profileImage = event.target.files[0];
  const ext = profileImage.name.split('.').pop();

  await upload({
    file: profileImage,
    /* we generate a random filename for ImageKit. You can pass through the original filename if you like */
    fileName: [uuidV4(), ext].join('.'),
    extensions: [
      {
        name: 'google-auto-tagging',
        minConfidence: 90,
        maxTags: 2,
      },
    ],
  });
};

Upload Method

The upload method is for client-side image uploads. This requires the authenticationEndpoint property also being set to an endpoint that conforms to the specification required.

It is up to you how and where you implement this endpoint, but ImageKit.io offers this documentation.

Hook Methods & Props

The following methods and properties are exposed via the useImageKit hook:

Method/Prop	Type	Description
upload	method	Used for client-side uploading of images (requires authenticationEndpoint)
url	method	Generate signed ImageKit.io URLs
urlEndpoint	string	The ImageKit.io endpoint that was passed into the ImageKitProvider
publicKey	string	The ImageKit.io public key that was passed into the ImageKitProvider
authenticationEndpoint	string	The authentication endpoint that was passed into the ImageKitProvider
imageKitClient	object	Raw ImageKit SDK client