What are the best practices for null handling in TypeScript?

What are the best practices for null handling in TypeScript?

In TypeScript, it's essential to use strict null checks. This helps prevent runtime errors by ensuring that variables are either defined or explicitly marked as nullable.

Can you explain how to use the optional chaining operator?

Sure! The optional chaining operator (?.) allows you to safely access deeply nested properties without having to check each level for null or undefined. For example, obj?.property?.subProperty will return undefined if obj or property is null.

What about using the nullish coalescing operator?

The nullish coalescing operator (??) provides a way to set default values for null or undefined variables. For instance, const value = userInput ?? 'default' assigns 'default' if userInput is null or undefined.

Are there any TypeScript configurations I should enable for better null handling?

Yes, enabling the strictNullChecks option in your tsconfig.json file is crucial. It ensures that null and undefined are treated as distinct types, helping you catch potential issues at compile time.