How do I handle undefined values in JavaScript?
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How do I handle undefined values in JavaScript?
You can handle undefined values in JavaScript using checks like 'if (value === undefined)' or using the nullish coalescing operator.
What is the nullish coalescing operator?
The nullish coalescing operator (??) returns the right-hand operand when the left-hand operand is null or undefined.
Can you give me an example of using it?
Sure! For example: let value = undefined; let result = value ?? 'default'; This will set result to 'default'.
What about using optional chaining?
Optional chaining (?.) allows you to safely access deeply nested properties without having to check each level for existence.
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