Quick JavaScript Crash Course - Modern and Advanced JavaScript - Nullish-Coalescing-Operator

The lecture introduces the knowledge coalescing operator, a feature in JavaScript ES2020, which helps handle cases where properties might be undefined or have default values like zero or blank strings. The operator is demonstrated using a user object with properties like ID and email. It addresses issues with default values in JavaScript, providing a more predictable way to handle such scenarios. The lecture concludes with a brief preview of the next topic.

What issues can arise when trying to access properties that may not exist on an object?

What is the knowledge coalescing operator and when is it used?

Explain how the knowledge coalescing operator can help with undefined properties in JavaScript.

How does the knowledge coalescing operator differ from using logical OR in JavaScript?

Describe a scenario where using the knowledge coalescing operator would be beneficial.