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    Code snippets

    This is a quick list of useful code snippets (small code samples) available for developers of extensions for the various Mozilla applications. Many of these samples can also be used in XULRunner applications, as well as in actual Mozilla code itself.

    These examples demonstrate how to accomplish basic tasks that might not be immediately obvious.

    General

    Examples and demos from MDN articles
    A collection of examples and demos from articles.
    Window code
    Opening and manipulating windows
    Toolbar
    Toolbar related code
    Sidebar
    Sidebar related code
    Forms
    Forms related code
    XML
    Code used to parse, write, manipulate, etc. XML
    File I/O
    Code used to read, write and process files
    Drag & Drop
    Code used to setup and handle drag and drop events
    Dialogs
    Code used to display and process dialog boxes
    Alerts and Notifications
    Modal and non-modal ways to notify users
    Preferences
    Code used to read, write, and modify preferences
    JS XPCOM
    Code used to define and call XPCOM components in JavaScript
    Running applications
    Code used to run other applications
    <canvas> related
    WHAT WG Canvas-related code
    Signing a XPI
    How to sign an XPI with PKI
    Delayed Execution
    Performing background operations.
    Miscellaneous
    Miscellaneous useful code fragments
    HTML to DOM
    Using a hidden browser element to parse HTML to a window's DOM

    JavaScript libraries

    Here are some JavaScript libraries that may come in handy.

    StringView
    A library that implements a StringView view for JavaScript typed arrays. This lets you access data in typed arrays using C-like string functions.
    Rosetta
    By default, the only possible standardized scripting language for HTML is ECMAScript. Hence, if you are going to use another scripting language you might expect that most of the browsers will not recognize it. Nevertheless, the increasing computational power of modern browsers together with the introduction of typed arrays in ECMAScript allow us, in theory, to build full virtual machines in pure ECMAScript. Therefore, it is also possible, in theory, to use ECMAScript for a smaller task: parsing exotic programming languages (i.e., creating compilers). This snippets shows a possible way to start from.

    Browser-oriented code

    Tabbed browser code (Firefox/SeaMonkey)
    Basic operations, such as page loading, with the tabbed browser, which is the heart of Mozilla's browser applications
    Cookies
    Reading, writing, modifying, and removing cookies
    Page Loading
    Code used to load pages, reload pages, and listen for page loads
    Interaction between privileged and non-privileged code
    How to communicate from extensions to websites and vice-versa.
    Downloading Files
    Code to download files, images, and to monitor download progress
    Password Manager
    Code used to read and write passwords to/from the integrated password manager
    Bookmarks
    Code used to read and write bookmarks
    JavaScript Debugger Service
    Code used to interact with the JavaScript Debugger Service

    SVG

    General
    General information and utilities
    SVG Animation
    Animate SVG using JavaScript and SMIL
    SVG Interacting with Script
    Using JavaScript and DOM events to create interactive SVG
    Embedding SVG in HTML and XUL
    Using SVG to enhance HTML or XUL based markup

    XUL Widgets

    HTML in XUL for Rich Tooltips
    Dynamically embed HTML into a XUL element to attain markup in a tooltip
    Label and description
    Special uses and line breaking examples
    Tree
    Setup and manipulation of trees using XUL and JS
    Scrollbar
    Changing style of scrollbars. Applies to scrollbars in browser and iframe as well.
    Autocomplete
    Code used to enable form autocomplete in a browser
    Boxes
    Tips and tricks when using boxes as containers
    Tabbox
    Removing and manipulating tabs in a tabbox

    Windows-specific

    Finding Window Handles (HWND) (Firefox)
    How to use Windows API calls to find various kinds of Mozilla window handles. Window handles can be used for IPC and Accessibility purposes.
    Using the Windows Registry with XPCOM
    How to read, write, modify, delete, enumerate, and watch registry keys and values.

    The content at MozillaZine Example Code is slowly being moved here, but you can still find useful examples there for now.

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