abalmus/TodoItem.js

## app.html
<template>
    <require from="./todo"></require>

    <div class="page-host">
        <todo />
    </div>
</template>

## app.js
export class App {}

## index.html
<!doctype html>
<html>
  <head>
    <title>Aurelia</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="styles.css">
  </head>
  <body aurelia-app="main">
    <h1>Loading...</h1>

    <script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/jspm_packages/system.js"></script>
    <script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/config.js"></script>
    <script>
      System.import('aurelia-bootstrapper');
    </script>
  </body>
</html>

## main.js
export function configure(aurelia) {
  aurelia.use
    .standardConfiguration()
    .developmentLogging();

  aurelia.start().then(a => a.setRoot());
}

## styles.css
.completed {
  text-decoration: line-through;
}

## todo.html
<template>
    <div>
        <ul>
            <li repeat.for="todo of todos" click.delegate="toggleTodo(todo)">
                <span class="${todo.completed ? 'completed' : ''}">
                    <span>${todo.id}</span> ${todo.title}
            </span>
            </li>
        </ul>
    </div>
    <form action="" submit.delegate="addTodo($event)">
        <input type="text" value.bind="newTodoTitle">
        <button type="submit">Add Todo</button>
    </form>
</template>

## todo.js
import {TodoItem} from './TodoItem';

export class Todo {
    todos = [];
    newTodoTitle;

    addTodo(e) {
        e.preventDefault();

        if (this.newTodoTitle) {
            this.todos.push(new TodoItem(this.newTodoTitle));
        }
    }

    toggleTodo(todo) {
        todo.toggle();
    }

}

## TodoItem.js
let nextTodoId = 0;

export class TodoItem {
    constructor(title) {
        this.id = nextTodoId++;
        this.title = title;
        this.completed = false;
    }

    toggle() {
        this.completed = !this.completed;
    }
}
	<template>
	<require from="./todo"></require>

	<div class="page-host">
	<todo />
	</div>
	</template>
	<!doctype html>
	<html>
	<head>
	<title>Aurelia</title>
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<link rel="stylesheet" href="styles.css">
	</head>
	<body aurelia-app="main">
	<h1>Loading...</h1>

	<script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/jspm_packages/system.js"></script>
	<script src="https://cdn.rawgit.com/jdanyow/aurelia-bundle/v1.0.3/config.js"></script>
	<script>
	System.import('aurelia-bootstrapper');
	</script>
	</body>
	</html>
	export function configure(aurelia) {
	aurelia.use
	.standardConfiguration()
	.developmentLogging();

	aurelia.start().then(a => a.setRoot());
	}
	<template>
	<div>
	<ul>
	<li repeat.for="todo of todos" click.delegate="toggleTodo(todo)">
	<span class="${todo.completed ? 'completed' : ''}">
	<span>${todo.id}</span> ${todo.title}
	</span>
	</li>
	</ul>
	</div>
	<form action="" submit.delegate="addTodo($event)">
	<input type="text" value.bind="newTodoTitle">
	<button type="submit">Add Todo</button>
	</form>
	</template>
	import {TodoItem} from './TodoItem';

	export class Todo {
	todos = [];
	newTodoTitle;

	addTodo(e) {
	e.preventDefault();

	if (this.newTodoTitle) {
	this.todos.push(new TodoItem(this.newTodoTitle));
	}
	}

	toggleTodo(todo) {
	todo.toggle();
	}

	}
	let nextTodoId = 0;

	export class TodoItem {
	constructor(title) {
	this.id = nextTodoId++;
	this.title = title;
	this.completed = false;
	}

	toggle() {
	this.completed = !this.completed;
	}
	}