How to Use JavaScript Optional Chaining With Array?

You can use optional chaining (?.) with an array by adding the ?. symbol before the array index accessor, like so: 

// ES11+
array?.[index]

For example: 

// ES11+
const arr = ['foo', 'bar', 'baz'];

console.log(arr?.[0]); // 'foo'
console.log(arr?.[10]); // undefined

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