Course
ES6 and Beyond
Safely Access a Property on a JavaScript Array with Optional Chaining
InstructorLaurie Barth
Published 4 years ago
Updated a year ago
You can use optional chaining to access elements in an array. If the array is null or undefined, attempting to access an element with optional chaining prevents an error from being thrown, returning undefined instead.
Laurie Barth: [0:00] Define an array with the elements 1, 2, and 3. We can access the first element of the array index zero. If we define a new array that's null and attempt to access the first element, we'll get an error. Instead, we can use optional chaining, ?., to access that element. Now we will safely receive undefined.
~ 2 years ago
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Thanks for this dense and smart course