What is the most efficient way to declare functions in Javascript?

Question

I have always learned that to declare a function in javascript you should do something like:

function myfunction(fruit){
    alert(\'I like \' + fruit + \'!\');
         


        

Answer 1

const

• provides a read only reference to your function variable, you can see it as a constant function, but don't think of it as an immutable one.

let

• allows you to create a local function, meaning that it's scope will be valid only within the enclosing block where it resides.

MDN references:

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/let
• https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Statements/const

Note: if I remember correctly, let and const are not interpreted correctly by all browsers.