Function Param not defined

Question

Why isn't my param working?

function myFunc(e){
  e = e || 'add' || 'remove';    
  document.body.classList.e('hide');
}
myFunc(remove);
myFunc(add);

if was trying to this

function spinner(e){

      let $spinner = document.querySelector('.isolador_spinner');

      if ( e === 'remove' ){
        $spinner.classList.remove('hideSpinner');
      } else if ( e === 'add' ) {
        $spinner.classList.add('hideSpinner');
      } else {
        console.log('e was not defined');
      }

    }

It claims e is not a function

Answer 1

To access an object property via an indirect variable, use bracket notation :

document.body.classList[e]('hide');

I'd also suggest using a name other than e for your parameter. In JavaScript, a function parameter named e conventionally means e is an Event . Calling it action might be a better choice.

The code you added in your edit also has a problem:

myFunc(remove);    // wrong - remove is not a variable
myFunc('remove');  // correct