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Which of the following ensures additional interactivity mechanism?

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Which of the following ensures additional interactivity mechanism?

(a) WAI ARIA

(b) Geolocation API

(c) Object API

(d) SDL API

This question was posed to me in examination.

The above asked question is from HTML APIs in portion Caching, Debugging and Animation of JavaScript

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The correct answer is (a) WAI ARIA

For explanation: Web Accessibility Initiative – Accessible Rich Internet Applications (WAI-ARIA) is a technical specification published by the World Wide Web Consortium (W3C) that specifies how to increase the accessibility of web pages, in particular, dynamic content, and user interface components developed with Ajax, HTML, JavaScript, and related technologies. WAI ARIA offers mechanisms to ensure that this additional interactivity remains usable independent of devices and disabilities.

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