Javascript Functions and default parameters, not working in IE and Chrome

Question

I created a function like this:

function saveItem(andClose = false) {

}

It works fine in Firefox

In IE it gives this error on the

Answer 1

Javascript does not allow a "default" specifier.

A quick way of doing what you would want is changing:

function saveItem(andClose = false) {

}

to the following:

function saveItem(andClose) {
    // this line will check if the argument is undefined, null, or false
    // if so set it to false, otherwise set it to it's original value
    var andClose = andClose || false;

    // now you can safely use andClose
    if (andClose) {
        // do something
    }
}