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- /**
- * @see Model.url
- */
- $(function () {
- const onChange = (...args) => {
- console.log('On change', args, TodoItem);
- };
- // Create a model class.
- const TodoItem = Backbone.Model.extend({
- defaults: {
- description: "Empty todo",
- status: "incomplete",
- },
- // RESTful web service, RoR flavor.
- urlRoot: '/server/todos',
- });
- // Create a model instance to load it by ID.
- const todoItem = new TodoItem({ id: 1 });
- // Listeners
- todoItem.on('change', onChange);
- // Skip listener during a change. Notice the value format.
- todoItem.set({ 'description': 'some other description' }, {silent: true});
- // Remove listener.
- //todoItem.off('change', onChange);
- /* Built-in events
- change - when any attribute is modified
- change:<attr> - when <attr> is modified
- destroy - when the model is destroyed
- sync - when the model successfully synced with the server
- error - when model save or validation fails
- all - on any event
- */
- // Check default attribute pre-fetch.
- const defaultDescription = todoItem.get('description');
- // Access the server at /server/todos/1 (urlRoot + '/' + item.id).
- const x = todoItem.fetch({ async: false });
- // Manipulate attributes.
- const description = todoItem.get('description');
- todoItem.set('status', 'complete');
- // Save on server.
- todoItem.save();
- // Destroy on server.
- // todoItem.destroy();
- // Create a view class.
- const TodoView = Backbone.View.extend({
- tagName: 'article',
- id: 'todo-view',
- className: 'todo',
- // Underscore templating.
- template: _.template('<h3><%= description %></h3>'),
- events: {
- // Generates this.$el.('h3", 'click', alertStatus).
- 'click h3': 'alertStatus',
- },
- alertStatus() {
- alert('Hey, you clicked the H3');
- },
- render: function () {
- const attributes = this.model.toJSON();
- const html = this.template(attributes);
- // Since this.el is a DOMElement, we can just wrap it with jQuery instead
- // of using a jQuery selector like $('#todo-view') or $('.todo').
- // This is better because it is id- and class- independent.
- // $(this.el).html(html);
- // Backbone even gives a shortcut: the $el property.
- this.$el.html(html);
- },
- });
- // Create a view instance.
- const todoView = new TodoView({ model: todoItem });
- // Build view.
- todoView.render();
- // console.log(todoView.el);
- // Apply to the DOM.
- $('#app').html(todoView.el);
- });
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