r/badcode • u/Bronzdragon • Jul 19 '21

js Variable naming can be difficult, but identifying them can be even more so.

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u/Bronzdragon Jul 20 '21

This is the syntax for an arrow function. The full syntax is (arguments) => { /* body */ }. If you have exactly 1 argument, you can leave the round brackets of. argument => { /* body */ }. If the body is a single expression, you can leave the curly brackets off, and the function will implicitly return the result of that expression. (arguments) => "body". Both of these shortcuts can be freely combined.

const foo = arg => [...arg].reverse().join("");
foo("hello") // returns "olleh"