Angular Interview Practice

What are the advantages of using fat-arrow functions?

1. Complex syntax and binding of this.

2. Longer and more verbose code.

3. Shorter syntax and cleaner code.

4. Increased memory usage.

The correct answer is: Shorter syntax and cleaner code.

The advantages of using fat-arrow functions, also known as arrow functions, primarily focus on their syntax and how they handle the `this` context. By providing a shorter syntax, arrow functions allow for more concise and readable code. This enhanced readability can be especially beneficial when used for inline functions, callbacks, or in functional programming patterns, as it reduces boilerplate code, helping developers write less while maintaining clarity. In addition to the cleaner code, another significant advantage of arrow functions is their lexical scoping of the `this` keyword. Unlike traditional function expressions, arrow functions do not have their own `this` context; instead, they inherit `this` from the parent scope in which they are defined. This behavior simplifies the handling of `this`, making them particularly useful in situations like event handlers or callbacks where maintaining the correct context can be problematic. The other options present features that do not align with the core benefits of fat-arrow functions. For instance, the complexity of syntax is notable in traditional function expressions, but arrow functions actually reduce complexity. Meanwhile, memory usage levels are similar to traditional functions, and using longer and more verbose code contradicts the main advantage of arrow functions, which is their ability to streamline code.