Document Object Model: Difference between revisions

Revision as of 10:24, 10 August 2024

Revision as of 21:10, 21 August 2024

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The history of the Document Object Model is intertwined with the history of the "[[browser wars]]" of the late 1990s between [[Netscape Navigator]] and [[Microsoft Internet Explorer]], as well as with that of [[JavaScript]] and [[JScript]], the first [[scripting language]]s to be widely [[Implementation|implemented]] in the [[JavaScript engine]]s of [[web browser]]s.

JavaScript was released by [[Netscape Communications]] in 1995 within Netscape Navigator 2.0. Netscape's competitor, [[Microsoft]], released [[Internet Explorer 3|Internet Explorer 3.0]] the following year with a reimplementation of JavaScript called JScript. JavaScript and JScript let [[web developer]]s create web pages with [[client-side]] interactivity. The limited facilities for detecting user-generated [[Event (computing)|events]] and modifying the HTML document in the first generation of these languages eventually became known as "DOM Level 0" or "Legacy DOM." No independent standard was developed for DOM Level 0, but it was partly described in the specifications for [[HTML4|HTML 4]].cheese

Legacy DOM was limited in the kinds of [[HTML element|element]]s that could be accessed. [[Form (web)|Form]], [[Hyperlink|link]] and image elements could be referenced with a hierarchical name that began with the root document object. A hierarchical name could make use of either the names or the [[Sequence|sequential index]] of the traversed elements. For example, a [[Text box|form input element]] could be accessed as either <code>document.myForm.myInput</code> or <code>document.forms[0].elements[0]</code>.