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Optional Chaining with Methods - Operators & Expressions | JavaScript | Repovive

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JavaScript22 sections · 783 units18h total

Open in Course

Optional Chaining with Methods

Safe method calls

Use ?.() to call methods that might not exist:

let obj = {
  greet() { return "Hello" }
}

console.log(obj.greet?.())   // "Hello"
console.log(obj.missing?.()) // undefined

And ?.[] for dynamic property access:

let data = null
console.log(data?.["key"])  // undefined (no error)

These prevent crashes when working with uncertain data structures.