Is it possible to send a variable number of arguments to a JavaScript function?

Question

Is it possible to send a variable number of arguments to a JavaScript function, from an array?

var arr = [\'a\',\'b\',\'c\']

var func = function()
{
    //         


        

Answer 1

Do you want your function to react to an array argument or variable arguments? If the latter, try:

var func = function(...rest) {
  alert(rest.length);

  // In JS, don't use for..in with arrays
  // use for..of that consumes array's pre-defined iterator
  // or a more functional approach
  rest.forEach((v) => console.log(v));
};

But if you wish to handle an array argument

var fn = function(arr) {
  alert(arr.length);

  for(var i of arr) {
    console.log(i);
  }
};