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‫React is a JavaScript library,

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‫and therefore you will need a good understanding

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‫of some essential JavaScript fundamentals,

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‫so if your JavaScript is a bit rusty,

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‫then this section is for you.

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‫So we're gonna review topics

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‫such as destructuring, the spread operator,

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‫template literals, ternaries, and asynchronous JavaScript

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‫with promises and async/await.

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‫Now, one of the things we do all the time in React

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‫is to work with immutable arrays,

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‫and so we will spend some time

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‫with the important array methods,

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‫map, filter, reduce and sort.

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‫Now, if you already know all these things,

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‫then please feel free to just skip this entire section

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‫and move right to the next one.

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‫(pleasant synth rock music)