Toggle values into and out of an array in Javascript

Question

I want to have a simple array of values, ie

var simpleArray = [\"SE1\",\"SE2\",\"SE3\"];

I want to check this array when an action happens (a c

Answer 1

my ES* variant

const toggleArrayValue = (arrayList, arrayValue) =>
  arrayList.includes(arrayValue)
    ? arrayList.filter(el => el !== arrayValue)
    : [...arrayList, arrayValue]