Why I prefer const: It encourages a single, immutable declaration
Why I prefer const:
It encourages a single, immutable declaration. This is often simpler.
Note how the logic using let below is much more syntax and noise. showRequiredLabel is set 3 times. 👎
With const, it’s referenced once, and the reader knows it can’t change. 👍
Reading the logic out loud for each emphasizes why I prefer const.
With let:
"Set showRequiredLabel to required. If showRequiredLabel is true, set showRequiredLabel to false if the requiredVariation is allFieldsRequired. If hideRequiredStyles is true, set showRequiredLabel to false.
With const:
"Set showRequiredLabel to true if required is true, hideRequiredStyles is false, and requiredVariation is not allFieldsRequired."
As a developer, we basically say the words above in our heads. So the const code isn't just easier to understand - it's quicker to read too.
Another way to avoid using let: Extract to a function that returns early.
This is helpful when the logic gets too complex to handle in a single expression.
