3cp/app.html

## app.html
<template>
  <require from="./line"></require>
  <line value.bind="1"></line>
</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">
  </head>
  <body aurelia-app>
    <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>

## line.html
<template>
  ${value}
</template>

## line.js
import {bindable} from 'aurelia-framework';

export class Line {
  @bindable value;

  // uncomment bind callback will make initial valueChanged unfired
  // bind() {}

  valueChanged(newV, oldV) {
    console.log('value changed from ' + oldV + ' to ' + newV);
  }

}
	<template>
	<require from="./line"></require>
	<line value.bind="1"></line>
	</template>
	<!doctype html>
	<html>
	<head>
	<title>Aurelia</title>
	<meta name="viewport" content="width=device-width, initial-scale=1">
	</head>
	<body aurelia-app>
	<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>
	import {bindable} from 'aurelia-framework';

	export class Line {
	@bindable value;

	// uncomment bind callback will make initial valueChanged unfired
	// bind() {}

	valueChanged(newV, oldV) {
	console.log('value changed from ' + oldV + ' to ' + newV);
	}

	}