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    Firefox 22 for developers

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    Changes for Web developers

    HTML

    • The HTML5 <data> element has been implemented (bug 839371).
    • The HTML5 <time> element has been implemented (bug 629801).
    • The range state of the <input> element (<input type="range">) has been implemented, behind the preference dom.experimental_forms_range, only enabled by default on Nightly and Aurora channel (bug 841948).
    • The support for the <template> element, part of the Web component specification has been implemented (bug 818976).

    JavaScript

    DOM

    CSS

    Changes for add-on and Mozilla developers

    Firefox Developer Tools

    • Font inspector shows which fonts on your computer are applied to the page.
    • Visual paint feedback mode shows when and where a page is repainted.
    • The dev tools may now be docked to the right side, not just the bottom of the browser.
    • Some panes within the dev tools have switched from XUL to HTML. For example, the css rule viewer is now chrome://browser/content/devtools/cssruleview.xhtml, not cssruleview.xul. Instead of adding an overlay directly to extend features of these panes, you may add an overlay and script to the outer xul document, to add load listeners and change these html documents.
    • The stack trace is now shown as a breadcrumb near the top, and the script listing is now at the left panel of the debugger.

    See also

    Versions

    Etiquetas y colaboradores del documento

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    Última actualización por: arai,