Always use const to declare variables. ???

Shouldn’t it be something along these lines :

• Always use let to declare variables. Always use const to declare constantes or references. Avoid using var. Not doing so will result in global variables…
• Use one const or let declaration per variable.

Maybe the “references” and “variables” parts should be merged, linked or moved next to each other.

[Mujaddadi]

I know it’s an old thread but I am also wondering the same. Why use constant for everything? For me It’s not semantically correct. I tend to follow Kyle Simpson for it. In all the languages I have written programs, constant means a constant such as value of PI. I use const for only constants. I think we are forgetting the semantic aspect of programming. Just because const is available to us, which will stop us reassigning the variable, it doesn’t mean we should use const for everything. Maybe it’s good for lazy programmer but we are abusing it.

Here is what my typical JavaScript file looks like

const PI =3.4;

function some(){ var someVar = 36; // So I know that this variable is available in all inner scopes of function

if(doSome){ let innerScopevar = 56; //Now I know it’s only available in this scope. }

}

[ljharb]

Nope! Everything should be const, because reassignment is something that should be avoided.