So what’s the thing with ES6 variables?
- “var“ still exists, but is rarely of any use. You can use it when a function needs to refer itself.
- “let” is like “var” without hoisting. Basically like a normal variable in most other languages.
- “const” is like “let”, but is read-only. If a variable shouldn’t be reassigned later, it’s good practice to use this.
So what should I use?
Think about it, then use what suits your needs. Not an easy answer? How about: Always use const, and then change it to let when your realise you have to reassign some value to it. And change to var when you realize you need to refer to yourself (e.g. in recursive functions).