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@workInProgress
@ngdoc overview
@name Cookbook: Hello World
@description
<doc:example>
<doc:source>
Your name: <input type="text" name="name" value="World"/>
<hr/>
Hello {{name}}!
</doc:source>
<doc:scenario>
iit('should change the binding when user enters text', function(){
expect(binding('name')).toEqual('World');
input('name').enter('angular');
expect(binding('name')).toEqual('angular');
});
</doc:scenario>
</doc:example>
# Things to notice
Take a look through the source and note:
* The script tag that {@link guide.bootstrap bootstraps} the angular environment.
* The text {@link angular.widget.HTML input widget} which is bound to the greeting name text.
* No need for listener registration and event firing on change events.
* The implicit presence of the `name` variable which is in the root {@link angular.scope scope}.
* The double curly brace `{{markup}}`, which binds the name variable to the greeting text.
* The concept of {@link guide.data-binding data binding}, which reflects any changes to the
input field in the greeting text.
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