<div data-bind="foreach: passengers">
<a href="#" data-bind='style: { color: isOwner ? "orange" : "darkgreen" },
text: person_username, click: function() { $root.removePassenger($data, $parent); } '>
Say I have a template like this. The click function should only be bound if isOwner is true. Is there a simple/easy way to do this? I'm guessing I could break out the full jquery templating and get something done, but I'd like to know a more elegant solution.
Thanks.
What you're asking for -- handle a click event only when some property is set -- is application logic. Application logic does not belong in the view. It belongs in the view model.
Sure, you could do something like:
click: function() { if ($data.isOwner) $root.removePassenger($data, $parent); }
But, again, that's putting logic in your view, which is frowned upon from a separation-of-concerns and debugging point of view, and it uglifies your HTML.
I'd suggest doing it like this:
<div data-bind="foreach: passengers">
<a href="#" data-bind='style: { color: isOwner ? "orange" : "darkgreen" },
text: person_username, click: function() { $root.removePassengerIfApplicable($data, $parent);"</a>
</div>
And your JavaScript:
function removePassengerIfApplicable(passenger, parent) {
if (passenger.isOwner) {
removePassenger(passenger, parent);
}
}
UPDATE
It wasn't clear from your post that you didn't want to show a link if isOwner = false. Here's some updated code for you:
<div data-bind="foreach: passengers">
<div data-bind="if: isOwner">
<a href="#" style="color: orange"
text: person_username, click: function() { $root.removePassenger($data, $parent); }"</a>
</div>
<div data-bind="if !isOwner()">
<span style="color: darkgreen" data-bind="text: person_username"></span>
</div>
</div>
The above code shows a link if isOwner, and a plain text span if not.
