Arrow Functions

Arrow functions MUST be used for callbacks and inline functions.

Arrow functions with a single parameter MAY omit parentheses.

Arrow functions with implicit return SHOULD omit braces and return keyword.

Example (Correct):

const items = products.filter(p => p.active)
const doubled = numbers.map(n => n * 2)

// Complex logic with braces
const processed = items.map(item => {
    const price = calculatePrice(item)
    return { ...item, price }
})