javascriptfunction

Set type for function parameters?

Is there a way to let a javascript function know that a certain parameter is of a certain type?

Being able to do something like this would be perfect:

function myFunction(Date myDate, String myString)
{
    //do stuff
}

Thank you!

Update: Being that the answer is a resounding "no," if I want myDate to be treated as a date (in order to call date functions on it), I have to cast it as a date inside the function or set a new variable of type Date to it?

Solution

  • No, plain JavaScript is not a statically typed language. Sometimes you may need to manually check types of parameters in your function body.

    However, you can use linters and supersets of JavaScript (like TypeScript, to emulate that behaviour or at least type hint, as seen in some of the other answers.