You are refactoring a codebase and converting regular functions to arrow functions. In which of the following cases would you need to be most cautious about changing the function type due to the "this" keyword's behavior?
- When the function is used as an event handler
- When the function is a method in a class or object
- When the function uses "let" instead of "var"
- When the function is used for mathematical operations
When converting regular functions to arrow functions, you need to be cautious when the function is a method in a class or object. Arrow functions do not have their own "this" binding and instead inherit it from their enclosing scope. This can lead to unexpected behavior in object methods if "this" is used within the function. In other cases, such as event handlers or simple functions, arrow functions may be safely used.
Loading...
Related Quiz
- To handle both resolve and reject in a single method, you can use the .finally method after a(n) _______ block in asynchronous functions.
- You're developing a game and you're using a two-dimensional array to represent a grid of game cells. How could you access the third cell in the second row of a grid defined as const grid = [[1,2,3], [4,5,6], [7,8,9]]?
- Which JavaScript method is used to bind a function to a specific object?
- In order to create a private variable in JavaScript, you might utilize a ________.
- A function declaration is hoisted to the top of the ________ in which it was defined.