The API allows you to store a value in the composition context. The mutableStateOf API allows you to create a mutable state object that can be updated.
The composition model is based on the concept of . A slot is a placeholder for a composable function. When you call a composable function, you're essentially filling a slot with a new composition.
When the state changes, the recomposer is notified and schedules a recomposition.
For those who want to dive deeper into the internals of Jetpack Compose, we've prepared a PDF guide that covers the topics discussed in this blog post.
During the measure phase, the framework measures the size of each composable and determines its position on the screen. During the layout phase, the framework lays out the composables according to their measured sizes and positions.