The action manager can be invoked explicitly from javascript code by creating a dictionary describing an action of the right type, and calling an action manager instance with it.
In below example I have written javascript to Include only parent level class. Like given below code in .js file : -

instance.web.TestWidget = instance.Widget.extend({
    dispatch_to_new_action: function() {
        this.do_action({
            type: 'ir.actions.act_window',
            res_model: "product.product",
            res_id: 1,
            views: [[false, 'form']],
            target: 'current',
            context: {},
        });
    },
});

Note- do_action() is a shortcut of Widget() looking up the "current" action manager and executing the action.