Unobtrusive JavaScript

<p>Unobtrusive JavaScript is a general approach to the use of <a href="/facts/Client-side/v7DVfjsH">client-side</a> <a href="/facts/JavaScript/XhhIIEsl">JavaScript</a> in <a href="/facts/Web_page/5JK7xQLe">web pages</a> so that if JavaScript features are partially or fully absent in a user's <a href="/facts/Web_browser/2pfyymLs">web browser</a>, then the user notices as little as possible any lack of the web page's JavaScript functionality. The term has been used by different technical writers to emphasize different aspects of <a href="/facts/Front-end_web_development/zl9U2fq0">front-end web development</a>. For some writers, the term has been understood more generally to refer to <a href="/facts/Separation_of_concerns/Tx8jawNT">separation of functionality</a> (the "behavior layer") from a web page's <a href="/facts/Markup_language/WwhlNVIu">structure/content</a> and <a href="/facts/Style_sheet_(web_development)/6vHquHxG">presentation</a>, while other writers have used the term more precisely to refer to the use of <a href="/facts/Progressive_enhancement/d54qcFcj">progressive enhancement</a> to support <a href="/facts/User_agent/dFEyg2Xj">user agents</a> that lack certain JavaScript functionality and users that have disabled JavaScript. Following the latter definition, unobtrusive JavaScript contributes to <a href="/facts/Web_accessibility/JsA6wN2l">web accessibility</a> insofar as it helps ensure that all users—whatever their computing platform—get roughly equal access to all of the web page's information and functionality.
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Unobtrusive JavaScript open-in-new

Unobtrusive JavaScript