Câu trả lời When should I use Arrow Functions in ES6?
When deciding when to use arrow functions in ES6, it's important to consider both their advantages and limitations to determine the most appropriate contexts for their use. Here are some guidelines based on the characteristics of arrow functions:
Advantages of Arrow Functions
Simpler Syntax: Arrow functions provide a more concise syntax for writing functions. They allow you to omit the function keyword, return statements, and curly braces when the function body consists of a single expression[1][2][4].
No Binding of this: Arrow functions do not have their own this context. Instead, this is lexically inherited from the outer function where the arrow function is defined. This is particularly useful in scenarios where you want to access the this from the surrounding code, such as in callbacks and methods defined within an object literal[1][2][4][5].
Implicit Return: If the function body consists of a single expression, arrow functions implicitly return the value of that expression without needing the return keyword. This makes them ideal for simple functions that immediately return a value[1][4].
Limitations and Considerations
Cannot be used as Constructors: Arrow functions cannot be used as constructors. They cannot be called with the new keyword because they do not have a [[Construct]] method. This means they are not suitable when you need a function to act as a constructor[1][4][5].
No Binding of arguments: Arrow functions do not have their own arguments object. Instead, they capture the arguments from the nearest non-arrow function. This can lead to unexpected behaviors if not properly understood[5].
Not Suitable for call, apply, and bind: Since arrow functions lexically bind their this value, methods like call, apply, and bind, which are used to set the this context, do not alter the this value inside arrow functions[4][5].
Recommended Use Cases
Event Handlers and Callbacks: Use arrow functions for event handlers or callbacks where you need to ...
