Programatically enable Content Approval (Moderation) in SharePoint List - sharepoint

Question

I am writing a app that creates a custom events list.
I'd like to enable content approval (also referred to Moderation on the back end) upon creation of the list.
Here's what my list-creation code looks like.
function createList(listToCreate)
{
// Create a SharePoint list with the name that the user specifies.
var hostUrl = decodeURIComponent(getQueryStringParameter("SPHostUrl"));
var hostContext = new SP.AppContextSite(currentContext, hostUrl);
var hostweb = hostContext.get_web();
var listCreationInfo = new SP.ListCreationInformation();
//title the list
listCreationInfo.set_title(listToCreate);
//set the base type of the list
listCreationInfo.set_templateType(SP.ListTemplateType.events);
var lists = hostweb.get_lists();
//use the creation info to create the list
var newList = lists.add(listCreationInfo);
var fieldCollection = newList.get_fields();
//add extra fields (columns) to the list & any other info needed.
fieldCollection.addFieldAsXml('<Field Type="User" DisplayName="Requester" Name="Requester" />', true, SP.AddFieldOptions.AddToDefaultContentType);
fieldCollection.addFieldAsXml('<Field Type="User" DisplayName="Manager" Name="Manager" />', true, SP.AddFieldOptions.AddToDefaultContentType);
fieldCollection.addFieldAsXml('<Field Type="Boolean" DisplayName="Approved" Name="Approved" />', true, SP.AddFieldOptions.AddToDefaultContentType);
//Attempting to enable moderation. This doesn't seem to have any effect.
newList.set_enableModeration(true);
currentContext.load(fieldCollection);
currentContext.load(newList);
currentContext.executeQueryAsync(onListCreationSuccess, onListCreationFail);
}
function onListCreationSuccess() {
alert("We've created a list since one didn't exist yet. Look in the site that hosts this app for the list." );
}
function onListCreationFail(sender, args) {
//alert("We didn't create the list. Here's why: " + args.get_message());
}
Unfortunately it seems that .set_enableModeration(true); has no effect. I don't get any errors, but when I look at the settings for the list I created using this code I see this:
So Content Approval clearly was not enabled via the method I'm using.

Answer 1

In order to set Content Approval using SP.List.enableModeration Property, the SP.List.update() Method have to be called as demonstrated below:
list.set_enableModeration(true);
list.update();