SCRIPT1006: Expected ')'

Question

In the function below, IE says that \')\' is missing:

function padZeros(num, size = 4) {
    var s = num+\"\";
    while (s.length < size) {
        s = \"0\"         


        

Answer 1

The issue is that Internet Explorer does not understand "default values for arguments" - this is ES2015+ and since development for IE stopped a long time ago, there's no way the new fangled ES2015+ syntax will ever work for IE

Try using a transpiler like babel for example until IE officially dies!

function padZeros(num) {
    var size = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 4;

    var s = num + "";
    while (s.length < size) {
        s = "0" + s;
    }
    return s;
}