Enabling client side validation of components

The Flow UI framework supports validating components on the client side, before sending the metadata to Flow for more complex validation. This can be useful for reducing latency on mobile devices, for clients with bandwidth constraints, or if we want to implement custom validation (say, an input that accepts a certain format).

Here is how we can enable client side validation:

        1. Create a new player.
        2. Find manywho.settings.initialize. (See Ln 120 in the image.)
        3. Copy-paste the following code:

          This is what the code looks like now:
        4. Click Save to save the player.