This simple application demonstrates the following parts of Polymer:

• defining custom elements
• the <template> tag
• HTML imports
• data binding

• pubspec.yaml: the Pub dependencies for this application.

• web/index.html: the main application file. This imports and uses the <demo-app> custom element.

• web/elements/demo_app.html and web/elements/demo_app.dart: the files for the <demo-app> element. This element imports and uses the <searchable-list> element.

• web/elements/searchable_list.html and web/elements/searchable_list.dart: the files for the <searchable-list> element.