<ul><li>The conventional way of adding optional properties in JavaScript involves using if statements or Object.assign.</li><li>A more concise, safe, and expressive method involves utilizing the && operator for adding optional properties in JavaScript objects.</li><li>The pattern efficiently handles optional properties without the need for mutations or conditionals, making the code cleaner and more structured.</li><li>This approach is recommended for scenarios like constructing payloads, working with dynamic data, and developing utility functions for better code readability and flexibility.</li></ul>

The Cleanest Way to Add Optional Properties in JavaScript

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