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What is an arrow function in JavaScript?
A JavaScript arrow function is a compact form of function expression. It is often used for short operations passed to other functions, and it takes its surrounding this context rather than creating its own.
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A reading list might turn several book titles into display labels. A short function can describe what happens to each title. Arrow syntax is one way to express that operation, with behaviour that differs from a regular function in some contexts.
Shorter notation still expresses a function
An arrow function is another way to write a JavaScript function, often seen when an operation needs a small piece of behaviour. An array transformation, for instance, applies a function to describe what should happen to each value.
The notation also has behaviour differences, including how it treats the surrounding meaning of this. It is not simply a shorter replacement in every situation. Recognising where a function gets its information is more useful than judging it only by the number of characters it uses.
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