July 2018
Beginner
236 pages
5h 34m
English
Content preview from MobX Quick Start Guide
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Handling changes in state
However, the preceding equation is only giving half the story of a UI. It's true that the visual representation is derived from the state (through the transformation function, fn), but it does not account for the user operations that occur on the UI. It's like we have completely ignored the user in the equation. After all, the interface is not just used to visually represent data (state), but to also allow the manipulation of that data.
This is where we need to introduce the concept of actions that represent these user operations, which results in a change in state. Actions are the commands that you invoke as a result of various input-events that are fired. These actions cause a change in the state, which is then ...
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