In JS arguments array in functions is a special object that can be used to get all the arguments passed to the function. Similar to this, arrow functions do not have their own binding to a arguments object, they are bound to arguments of enclosing scope.
Arrow functions are callable but not constructable
If a function is constructable, it can be called with new, i.e. new User(). If a function is callable, it can be called without new (i.e. normal function call).
Functions created through function declarations / expressions are both constructable and callable.
Arrow functions (and methods) are only callable. class constructors are only constructable.
If you are trying to call a non-callable function or to construct a non-constructable function, you will get a runtime error
let arrowFunc = () => {}
new arrowFunc()
This code gives the error:
arrowFunc is not a constructor
I don’t want to sell you my point of view, instead I suggest you read what they say here and get your own idea based on your style of writing code. developer.mozilla.org/en-US/docs/W...
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Why need arrow function?
Is it comes with just short our code or ........what?
Not really. Arrow functions don't have their own
this, which can be handy in some cases.Arrow functions do not have a arguments array
In JS arguments array in functions is a special object that can be used to get all the arguments passed to the function. Similar to this, arrow functions do not have their own binding to a arguments object, they are bound to arguments of enclosing scope.
Arrow functions are callable but not constructable
If a function is constructable, it can be called with new, i.e. new User(). If a function is callable, it can be called without new (i.e. normal function call).
Functions created through function declarations / expressions are both constructable and callable.
Arrow functions (and methods) are only callable. class constructors are only constructable.
If you are trying to call a non-callable function or to construct a non-constructable function, you will get a runtime error
source
I don’t want to sell you my point of view, instead I suggest you read what they say here and get your own idea based on your style of writing code.
developer.mozilla.org/en-US/docs/W...