react-templates/playground/samples/todo.code

{
    mixins: [React.addons.LinkedStateMixin],
    getInitialState: function () {
        return {edited: '', todos: [], counter: 0};
    },
    add: function () {
    if (this.state.edited.trim().length === 0) {
        return;
    }
        var newTodo = {value: this.state.edited, done: false, key: this.state.counter};
        this.setState({todos: this.state.todos.concat(newTodo), edited: '', counter: this.state.counter + 1});
    },
    remove: function (todo) {
        this.setState({todos: _.reject(this.state.todos, todo)});
    },
    toggleChecked: function (index) {
        var todos = _.cloneDeep(this.state.todos);
        todos[index].done = !todos[index].done;
        this.setState({todos: todos});
    },
    clearDone: function () {
        this.setState({todos: _.filter(this.state.todos, {done: false})});
    }
}