you don't have nothing to do, this is look like a syndrome.

no way bruh

"That one guy"? This is the second most popular solution. 😆

there is always that one guy with the arrow functions

Love it!

Implicit returns in arrow functions are dependant on the lack of a body block, not being one-line.

// e.g.
(() => 

1)()

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions#Function_body

Also arrow functions context differ from regular function expressions and declerations. They follow Lexical scope. I recomend reasearching this difference and when it is better to use an arrow funciton over other ways of writing it. It makes a difference when using the 'this' key word.

the most common use is just to make things shorter. Arrow functions automatically return without specifying 'return' if the function is on one line.

that notation is for ECMAScript 6. We should all use it.

const is short for constant, which means it will never change. Under normal circumtances, functions can be redefined later, but const cannot.

As for performance, it depends on the execution engine. If the Javascript is being compiled (as happens on many browsers nowadays), then const can be faster than the standard var, since the compiler can optimize on the content of const never changing. That being said, you'd probably need a ridiculous Javascript app to actually see the performance benefits, slight as they are.

is there any difference between them?

no, it's not

Is the const funcName = ... faster than function funcName... I see it so often here.