Href and mailto links in KnockoutJS

Question

I'm trying to display a table with links and mailto's in a display template using Knockout. I'm still really new to knock out to I apologize in advance!

This is what my display template was originally:

<script type="text/template" id="customerSearchDisplayTemplate">
    <td class="hiddenId">{0}</td>
    <td><a href="/wrenchsciencewebadmin2/UserManager/Customer/CustomerEditor.aspx?CustomerID={1}">{1}</a></td>
    <td><a href="mailto:{2}">{2}</a></td>
    <td>{3}</td>
    <td>{4}</td>
    <td>{5}</td>
    <td>{6}</td>     
    <td>{7}</td>
    <td><a href="/wrenchsciencewebadmin2/Common/PopupWindows/CustomerNotes.aspx?customerid={8}">{8}</a></td>                     
</script>

and this is what I have so far, minus the mailto AND links:

<script type="text/template" id="customerSearchDisplayTemplate">
    <tr>
        <td class = "hiddenId"><span data-bind="text: customerSearchID"/></td> 
        <td><span data-bind="text: fullName" /></td>
        <td><span data-bind="text: primaryEmail" /></td>
        <td><span data-bind="text: secondaryEmail" /></td>
        <td><span data-bind="text: homePhone" /></td>
        <td><span data-bind="text: workPhone" /></td>
        <td><span data-bind="text: mobilePhone" /></td>
        <td><span data-bind="text: lastLogonDate" /></td>
        <td><span data-bind="text: wsNotes" /></td>            
    </tr>
</script>

Solution 1

Using the attr and text properties in the data-bind attribute like so:

<script type="text/template" id="customerSearchDisplayTemplate">
    <tr>
        <td class = "hiddenId"><span data-bind="text: customerSearchID"/></td> 
        <td><span data-bind="text: fullName" /></td>
        <td>
            <span>
                <a data-bind="text: primaryEmail, 
                              attr: {href: 'mailto:'+primaryEmail()}" />
            <span/>
        </td>
        <td>
            <span>
                <a data-bind="text: secondaryEmail, 
                              attr: {href: 'mailto:'+secondaryEmail()}" />
            <span/>
        </td>
        <td><span data-bind="text: homePhone" /></td>
        <td><span data-bind="text: workPhone" /></td>
        <td><span data-bind="text: mobilePhone" /></td>
        <td><span data-bind="text: lastLogonDate" /></td>
        <td><span data-bind="text: wsNotes" /></td>            
    </tr>
</script>

Solution 2

If you want to go MVVM all the way, it's best to keep your View as dumb as possible:

<a data-bind="text: primaryEmail, attr: {href: primaryEmailMailtoLink}"></a>

Then make a computed observable on your view model:

var ViewModel = function() {
    var self = this;

    // Observable property:
    self.primaryEmail = ko.observable('[email protected]');

    // Dependent observable:
    self.primaryEmailMailtoLink = ko.computed(function() {
            return 'mailto: ' + self.primaryEmail();
    };

    // Etc. (rest of your view model)
}