Passing an array as a function parameter in JavaScript

Question

I\'d like to call a function using an array as parameters:

const x = [\'p0\', \'p1\', \'p2\'];
call_me(x[0], x[1], x[2]); // I don\'t like it

function call_         


        

Answer 1

While using spread operator we must note that it must be the last or only parameter passed. Else it will fail.

function callMe(...arr){ //valid arguments
    alert(arr);
}

function callMe(name, ...arr){ //valid arguments
    alert(arr);
}

function callMe(...arr, name){ //invalid arguments
    alert(arr);
}

If you need to pass an array as the starting argument you can do:

function callMe(arr, name){
    let newArr = [...arr];
    alert(newArr);
}