Gate is a hook for conditional rendering, based on the current value (or values) in props. It can solve problems such as compiling all required data when a component mounts, or showing an alternative component if there is insufficient data in props. Gate is also useful for routing or animations, similar to ReactTransitionGroup.

This enables the creation of a feedback loop by sending props back to a Store.

Gate can be integrated via the useGate hook or as a component with props. Gate stores and events function as standard units within an application.

Gate has two potential states:

• Opened, indicating the component is mounted.
• Closed, indicating the component is unmounted.

Example of using Gate as a component:

<Gate history={history} />

Properties

.state Store

Store<Props>: DerivedStore containing the current state of the gate. This state derives from the second argument of useGate and from props when rendering the gate as a component.

Example

const Gate = createGate();

Gate.state.watch((state) => console.info("gate state updated", state));

function App() {
  useGate(Gate, { props: "yep" });
  return <div>Example</div>;
}

ReactDOM.render(<App />, root);
// => gate state updated { props: "yep" }

.open Event

Event: Event fired upon gate mounting.

.close Event

Event: Event fired upon gate unmounting.

.status Store

Store: Boolean DerivedStore indicating whether the gate is mounted.

Example

const Gate = createGate();

Gate.status.watch((opened) => console.info("is Gate opened?", opened));
// => is Gate opened? false

function App() {
  useGate(Gate);
  return <div>Example</div>;
}

ReactDOM.render(<App />, root);
// => is Gate opened? true