How to achieve deprecated CompositeView functionality in Marionette 3+?
As stated in the latest Marionette docs:
CompositeView is deprecated. You should use the replaceElement option on Region.show and render a CollectionView into a region inside a View to achieve this functionality.
I still can't understand how CompositeView functionality should be achieved now.
Previously, CompositeView was perfect for using with such template:
<script id="table-template" type="text/html">
<table>
<% if (items.length) { %>
<thead>
<tr>
<th>ID</th>
<th>Name</th>
<th>Description</th>
</tr>
</thead>
<% } %>
<tbody></tbody>
<tfoot>
<tr>
<td colspan="3">some footer information</td>
</tr>
</tfoot>
</table>
new MyCompositeView({
template: "#table-template",
templateContext: function() {
return { items: this.collection.toJSON() };
}
// ... other options
});
If we decide to use LayoutView instead of CompositeView then we need to code manually a lot of event bindings (for example to show / hide table header based on number of items in collection). This makes things harder.
Are there any clean and not complicated ways to live without CompositeView ?
Thank you for any help or advice.
It looks like Marionette 3 is going to get rid of some concepts to make the framework simpler overall, and easier to understand.
Marionette.View in 3 is going to include functionality from what was ItemView and LayoutView. CompositeView is deprecated in favour of just using RegionManager, which is now included into View.
v2 --> v3
View -> AbstractView
ItemView, LayoutView -> View
Here's a quick example app:
var color_data = [ { title:'red' }, { title:'green' }, { title:'blue' } ];
var Color = Backbone.Model.extend({
defaults: { title: '' }
});
var Colors = Backbone.Collection.extend({
model: Color
});
var ColorView = Mn.View.extend({
tagName: 'tr',
template: '#colorTpl'
});
var ColorsView = Mn.CollectionView.extend({
tagName: 'tbody',
childView: ColorView
});
var AppView = Mn.View.extend({
template: '#appTpl',
templateContext: function(){
return {
items: this.collection.toJSON()
};
},
ui: {
input: '.input'
},
regions: {
list: {
selector: 'tbody',
replaceElement: true
},
},
onRender: function(){
this.getRegion('list').show(new ColorsView({
collection: this.collection
}));
},
events: {
'submit form': 'onSubmit'
},
onSubmit: function(e){
e.preventDefault();
this.collection.add({
title: this.ui.input.val()
});
this.ui.input.val('');
}
});
var appView = new AppView({
collection: new Colors(color_data)
});
appView.render().$el.appendTo(document.body);<script src='http://libjs.surge.sh/jquery2.2.2-underscore1.8.3-backbone1.3.2-radio1.0.4-babysitter0.1.11-marionette3rc1.js'></script>
<script id="colorTpl" type="text/template">
<td><%=title%></td>
<td style="background-color:<%=title%>"> </td>
</script>
<script id="appTpl" type="text/template">
<table width="100%">
<% if(items.length) { %>
<thead>
<tr>
<th width="1%">Title</th>
<th>Color</th>
</tr>
</thead>
<% } %>
<tbody></tbody>
<tfoot>
<tr>
<td colspan="2">
<form><input type="text" class="input" autofocus><input type="submit" value="Add Color"></form>
</td>
</tr>
</tfoot>
</table>
</script>