This Angular demo runs in the browser using GPU where available.
We implemented it as a tiny web app loaded inside this page to test the performance.

Angular Demo (experimental - modern browsers only)

Here we first use JavaScript in the front end to classify the randomly loaded images locally, without a back end. We chose to use a deep convolutional neural network (CNN) architecture called SqueezeNet.
The model is small, thus the bundled JavaScript file for the demo is just 634 kB, including the trained model, Angular and the actual app.
For more complex cases we would use a back end and call the API from the front end. The second example shows this.