Salesforce JavaScript Developer Practice Exam

What happens when you add properties to a function in JavaScript?

1. Nothing, this is totally fine!

2. SyntaxError. You cannot add properties to a function this way.

3. "Woof" gets logged.

4. ReferenceError

The correct answer is: Nothing, this is totally fine!

When you add properties to a function in JavaScript, it is perfectly acceptable and does not cause any errors or issues in the code. Functions in JavaScript are first-class citizens, meaning they can be treated like any other object. This includes the ability to add properties and methods to them dynamically, just as you would with any object. Here is an example to illustrate this concept: ```javascript function myFunction() { console.log("Hello!"); } myFunction.sound = "Woof"; console.log(myFunction.sound); // This would log "Woof" to the console ``` In this case, `myFunction` is defined as a function, and a property called `sound` is added to it, which holds the string "Woof". This demonstrates that JavaScript functions can indeed have properties assigned to them without any syntax or runtime errors. Understanding this allows developers to create functions that have associated data, making it easier to manage behaviors and related states in a structured way. This flexibility is a core aspect of JavaScript's design, enhancing how functions can be utilized in programs.