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Beginning JavaScript for React Native

Switch / Case Statement

 
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The switch/case statement is another way to branching in JavaScript. It is an alternative to an if/else block - but it is also more flexible than if, because it can check for any value of the switching variable - and not just true or false.

Switch/case is often used in React applications in Redux reducers - which are often big functions with a single switch/case, which represents the entire function.

Summary of Content:

  • Defining a simple switch statement and a few case blocks
  • Preventing "fall through" with break or return
  • Switch checks against value and type (===)
  • Using default to provide a default return value from switch/case

Resources:

https://www.w3schools.com/js/js_switch.asp

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Lessons in Beginning JavaScript for React Native