Databases
StackOverflow2013
Postsdbo
POHow can my Knockout/RequireJS widget bind to the correct context when used in a site that also uses Knockout?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow can my Knockout/RequireJS widget bind to the correct context when used in a site that also uses Knockout?
    primarykey
    data
    text
    <h1>Scenario</h1> <p>I'm building a widget using RequireJS and KnockoutJS. The widget calls <code>ko.applyBindings(widgetViewModel, thisWidget)</code> when it's instantiated. The widget should be able to used in a site regardless if the site uses Knockout itself.</p> <h1>Problem</h1> <p>When I drop my widget into a site that uses Knockout then the wrong view model is applied to the widget if the site invokes <code>ko.applyBindings(siteViewModel)</code> after the widget is setup. The widget gets <code>siteViewModel</code> instead of the desired <code>widgetViewModel</code>.</p> <h1>What I've tried so far</h1> <ol> <li><p><strong>Reordering the call to <code>ko.applyBindings(siteViewModel)</code> to happen before widget setup.</strong> This works but is not ideal because it places restrictions on how my widget is invoked.</p></li> <li><p><strong>Add a custom binding for my widget that applies the correct binding context (i.e. <code>widgetViewModel</code> to my widget and returns <code>{controlsDescendantBindings: true};</code></strong> Unfortunately the Knockout instance used by the site is not the same as the one used by my widget (because of Require) so I'd need to access the site's instance, possibly by looking the global namespace.</p></li> </ol>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USSpig
    1. USSpig
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow can my Knockout/RequireJS widget bind to the correct context when used in a site that also uses Knockout?
      1. USmaerics
      1. VTFavorite
    2. VO
      singulars
      1. POHow can my Knockout/RequireJS widget bind to the correct context when used in a site that also uses Knockout?
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POHow can my Knockout/RequireJS widget bind to the correct context when used in a site that also uses Knockout?
      1. This table or related slice is empty.
      1. VTUpMod
    1. COThis is a challenging one. My thought at the moment would be to wrap your widget in a container that has a binding like I described [here](http://www.knockmeout.net/2012/05/quick-tip-skip-binding.html). Then, when your widget script loads, add the custom binding to your instance of KO and see if window.ko exists and add it there as well. The only remaining issue would be if you are using multiple KO versions through require.js or if there is a timing issue from when `ko.applyBindings` is called and when your module is loaded. Would be good if we added a `stopBindings` like binding to KO core.
      singulars
      1. POHow can my Knockout/RequireJS widget bind to the correct context when used in a site that also uses Knockout?
      1. USRP Niemeyer
    2. COYeah, that was the approach I was taking but I'm not 100% happy about having to divine the location of the outer container's instance of KO.
      singulars
      1. POHow can my Knockout/RequireJS widget bind to the correct context when used in a site that also uses Knockout?
      1. USSpig
    3. CORight, currently I can't think of a better solution that doesn't also have drawbacks. For example, you could use a [custom binding provider](http://www.knockmeout.net/2011/09/ko-13-preview-part-2-custom-binding.html) that doesn't use `data-bind` and uses `spig-bind` (or whatever), but that might mess up the existing instance of KO. It could support both attributes, so that in the case that your page and your widget use the same instance of KO, you will still be okay. Still not great, just another thought.
      singulars
      1. POHow can my Knockout/RequireJS widget bind to the correct context when used in a site that also uses Knockout?
      1. USRP Niemeyer
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload