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H93 Example 1: Ensuring that `id` attributes are unique on a Web page

Fruits:

Apple
Orange
Pear

Vegetables:

Peas
Carrots
Spinach

Tested on:

Windows 7, Firefox ESR 45.4.0, and JAWS 17.
- Result: HTML validation does not find duplicate ids.
iOS 10.2.1, Safari browser is based on the iOS version, VoiceOver on iPad
- Result: HTML code shows ids are unique id="fruits" for Fruits and id="vegetable" for Vegetable in the list on the web page.
Android 7.1.2; Pixel, Chrome 55.0.2883.91, and TalkBack Version: 5.0.4.3.
- Result: TalkBack announces