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Discussion on: Level Up with JavaScript

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loicboset profile image
Loïc Boset •

Thanks for your article!

Is there a difference between this

function greetMe(yourName) { 
    alert("Hello " + yourName); 
}
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and this

const greetMe = (yourName) => alert("Hello " + yourName)
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or is the completely equivalent?

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alexander89 profile image
Alexander Halemba • • Edited

They are different. For example, "functions" have a "this" pointer. Fat arrow functions try to find "this" in the scope.

I try to avoid "funtions" whenever I can.

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devcronin profile image
DevCronin •

Thank you for replying!

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loicboset profile image
Loïc Boset •

Thank you!

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devcronin profile image
DevCronin •

Exactly what Alexander said. In addition let and var can be used. It is most common preactice now to use let and const though. I will be digging deeper into the different types later in the blog series. For now though, const is used to create a variable that can not be changed. Var can be changed anywhere. Let can be changed in the Block scope of the function.

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loicboset profile image
Loïc Boset •

Thanks!