backbone.jsHow do I create a todo list application using Backbone.js?
To create a todo list application using Backbone.js, you'll need a few pieces of code.
- First, create a model for your todo list item. This will include properties for the item's title, description, and completion status.
var Todo = Backbone.Model.extend({
defaults: {
title: '',
description: '',
completed: false
}
});
- Next, create a collection to store your todo list items.
var TodoList = Backbone.Collection.extend({
model: Todo
});
- Create a view to render your todo list items. This view will include a template for the HTML, and a render function to populate the template with data from the collection.
var TodoView = Backbone.View.extend({
tagName: 'li',
template: _.template('<h3><%= title %></h3><p><%= description %></p>'),
render: function(){
this.$el.html(this.template(this.model.toJSON()));
return this;
}
});
- Create an instance of your collection, and add some todo list items to it.
var todoList = new TodoList();
todoList.add([
{ title: 'Mow the lawn', description: 'Fill the gasoline tank and start the engine' },
{ title: 'Wash the car', description: 'Fill the soap tank and start the engine' }
]);
- Create a view for the entire todo list. This view will loop through the collection, creating a new instance of the TodoView for each item.
var TodoListView = Backbone.View.extend({
tagName: 'ul',
render: function(){
this.collection.each(function(todo){
var todoView = new TodoView({ model: todo });
this.$el.append(todoView.render().el);
}, this);
return this;
}
});
- Finally, create an instance of the TodoListView, and render it to the page.
var todoListView = new TodoListView({ collection: todoList });
$('body').append(todoListView.render().el);
This will render an unordered list of your todo list items to the page.
Helpful links
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