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Let's get the features in early!

If you're working on a Javascript application for GNOME, you'll be interested to know that you can now write GTK+ widget templates in gjs.

Many thanks to Giovanni for writing the original patches. And now to a small example:

const MyComplexGtkSubclass = new Lang.Class({ Name: 'MyComplexGtkSubclass', Extends: Gtk.Grid, Template: 'resource:///org/gnome/myapp/widget.xml', Children: ['label-child'], _init: function(params) { this.parent(params); this._internalLabel = this.get_template_child(MyComplexGtkSubclass, 'label-child'); } });
And now you just need to create your widget:

let content = new MyComplexGtkSubclass(); content._internalLabel.set_label("My updated label");
You'll need gjs from git master to use this feature. And if you see anything that breaks, don't hesitate to file a bug against gjs in the GNOME Bugzilla.