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JavaScript Basic Arrow Syntax

Jessica Graham
Jessica Graham
6,878 Points
Posted by Jessica Graham
Jessica Graham
6,878 Points

Definition of function declaration, function expressions(const), arrow function

Could someone please explain to me in laymen terms what the difference between these are, I'm struggling to understand what the purpose of function expression/ arrow functions are. Thank you in advance

1 Answer

Alexander Davison
Alexander Davison
65,469 Points

Take a look in this code:

function () {
  return 1;
}

// The above is the same as...

() => {
  return 1;
}

// All the code above create a un-reusable function. All of the code below creates a reusable function.

function a() {
  return 1;
}

// The above code is the same as...

var a = function () {
  return 1;
}

// The above code is the same as...

var a = () => {
  return 1;
}

I hope this helps :grin:

~Alex

Jessica Graham
Jessica Graham
6,878 Points
Jessica Graham
Jessica Graham
6,878 Points

Thank you so much for your help, I really appreciate it :-)

Alexander Davison
Alexander Davison
65,469 Points

No problem :smile: