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Launchpad manual
Launchpad manual
  • User documentation
    • Get started
    • Tutorial
      • Get started with launchpadlib
    • How-to guides
      • Import an OpenPGP key
      • Import your SSH keys
      • Log into websites with OpenID
      • Create a source package recipe
      • Help the community
      • Manage your account
        • Create and personalize your Launchpad account
        • Merge two or more accounts
        • Application integration
        • Close your account
      • Projects
        • Register your project
        • Transfer ownership of a project
        • Project translations
          • Import project translations
          • Import translation templates
          • Export translations
      • Packaging
        • Install software from PPAs
        • Install software from private PPAs
        • Upload a package to a PPA
        • Build snaps in Launchpad
        • Build rocks in Launchpad
        • Build charms in Launchpad
        • Build OCI images in Launchpad
        • Create a Personal Package Archive (PPA)
        • Use the PPA snapshot service
        • Copy packages from PPAs
        • Delete packages from PPAs
      • Launchpad web services API
        • Sign web requests
      • Work with launchpadlib
        • Using launchpadlib
        • Use the Python API
        • Authenticate launchpadlib from a text-based browser
        • Authenticated access for website integration
        • View supported fields and methods
      • Work with bugs
        • Display bug reporting guidelines
        • File a bug
        • Link a bug to a branch
        • Managing bugs through email
        • Use the Bugzilla plugin
        • Use the Launchpad email interface
        • Use the Trac plugin
        • Use the Malone XMLRPC interface
        • Import your project's bug history
        • Subscribe and unsubscribe to bugs
        • Track bugs with Mantis
      • Work with code hosted on Launchpad
        • Host your project's code on Launchpad
        • Link code to bug reports and blueprints
        • Create and maintain a personal branch in Launchpad
        • Create and manage a merge proposal
    • Reference
      • Bugs
        • Bug attachment
        • Bug expiry
        • Bug heat
        • Bug subscription
        • Email interface command reference
        • Multi-project bugs
          • Multi-project bugs
          • Tracking bugs across multiple projects
        • Roles
          • Bug supervisor
        • The Malone xmlrpc interface
        • Turning a bug into a question
      • Bug tracker API
        • Bug statuses
        • External bug statuses
        • Plugin API
        • Interoperability with external bug trackers
      • Commenting syntax
      • Proprietary hosting
      • Glossary
      • Launchpad and community
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        • Legal
          • Launchpad policies
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      • launchpadlib API compatibility
      • Live-file-systems
      • Loggerhead
      • Packaging
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          • Personal Package Archive
          • Building a source package
        • Build scores
        • Builder Specs
        • Source builds
          • Naming conventions
          • Source builds knowledge base
      • Privacy and confidentiality
      • Project groups
      • Question life cycle
      • Roles in code review
      • SSH fingerprints
      • Support in your native language
      • Table of applications using the API
      • Teams
        • Launchpad teams
      • Translations
        • Software translation
        • Translation guidelines
        • Language-specific guides
        • Permissions policies
        • Import policy
        • Translators group
        • Licensing
        • Plural forms for languages
        • Reusing translations
        • PO templates
        • Translation best practices
        • Translation sharing and suggestions
      • Troubleshooting
        • Email address already in use
      • User preferences
      • Webhooks
    • Explanation
      • What is Launchpad?
      • Your Launchpad account
      • Understanding karma
      • Collaborating using Launchpad
      • Answers
        • Launchpad Answer Tracker
        • Asking for help
      • Feature highlights
        • Answer Tracker
        • Blueprints
        • Personal Package Archives
        • Bug watches
        • Milestones
        • Bug branch linking
        • Product series
        • The bug tracker
        • Page tour
      • Launchpad API
        • Launchpad web service
        • The launchpadlib API
      • Rationale headers in Launchpad email
      • OOPS
      • Packaging
        • Packaging
        • Package upload errors
      • Privacy, confidentiality and disclosure
      • Projects
        • Registering your project
        • Planning and recording releases
        • Making your project files available for download
        • Providing support
        • Publishing project announcements
        • Closing a project
      • Staging environment
      • Support requests
      • Teams
        • Creating and running teams
        • Indirect team members
        • Team management
        • Team repositories
      • Translating
        • Translating with Launchpad
        • Using Rosetta
        • Translating your project
        • Translating your software
        • Translation groups
        • Translating partial PO files
        • Preparing to translate
      • Working with code
        • Code imports
        • Git hosting
        • Launchpad CI
  • Developer documentation
    • Tutorials
      • Creating a new page in Launchpad
      • Building charms in Launchpad
    • How-to guides
      • Get started
        • Get the source code
        • Setting up and running Launchpad (quickstart)
        • Setting up and running Launchpad (advanced)
        • Launchpad database setup
        • How to develop with Buildd
        • How to use Soyuz locally
      • Operate Launchpad
        • Getting an overview of Launchpad’s build farm
        • Checking availability of Launchpad frontends
        • Manage users and teams in development environments
        • Create job to publish artifact
        • Triaging Launchpad project bugs
        • Landing updates for Loggerhead
        • Building and publishing Launchpad development LXD images
        • How to use lp-shell
      • Common development tasks
        • Fixing bugs
        • Contributing changes
        • Using an updated dependency
        • Database schema changes process
        • Applying database schema changes
        • Importing an Ubuntu package
      • Launchpad development tips
        • Updating the global configuration for tests
        • Handling security policies
        • Testing CLI scripts
        • Handling exceptions
        • Preserving query count
        • Profile Launchpad performance
        • Running Launchpad with Chameleon template engine
        • Launchpad API docs generation
        • How to use codehosting locally
        • Renaming a database table
        • MockIo library
      • Debug
        • Debug tests with Visual Studio Code
        • Debug stories/pagetests
        • Troubleshoot breakpoint issues when running multiple test layers
    • Reference
      • Python style guide
      • Tests style guide
      • CSS style guide
      • Tagging bugs about Launchpad
      • Build farm
      • Signing service
      • Fetch service
      • Buildbot
      • Automatic translations tarball exports
      • Mirror prober
      • Ubuntu mirrors index
      • Git hosting
      • Code import
      • Launchpad public mailing lists archives
      • Launchpad and email
    • Explanation
      • The ideas behind Launchpad
        • What is Launchpad?
        • About Launchpad security
        • Launchpad strategy
        • Launchpad values
      • Core components and setting up Launchpad
        • Parts of Launchpad
          • Launchpad code hosting
          • Engineering overview: translations
          • Librarian file storage
          • Launchpad mail
          • About Malone
          • Navigation menus
          • Launchpad registry
          • URL traversal
        • Publisher
          • Ubuntu package publishing
          • Ubuntu archive publisher
          • Valid-Until configuration for distribution series
        • Application framework
        • Code concepts
        • The Launchpad PPA
        • Navigating the tree
        • Launchpad pip integration
        • Launchpad installation details
        • Testing
        • Building live filesystems in Launchpad
      • Database
        • Database performance
        • Live database patching
        • PostgreSQL and Launchpad
        • Storm migration guide
        • Working with db-devel
      • Developing the Launchpad project
        • About Launchpad branches
        • Datetime usage guide
        • Error explanations
        • Feature flags
        • Hacking
        • The journey of a Launchpad change from a developer’s branch to production
        • Pre merge reviews
        • XXX policy
      • Best practices for development
        • Architectural guide
        • Assertions in Launchpad
        • Bug triage process background
        • Charm development
        • Code import in depth
        • Page tests
        • About Launchpad performance
        • Launchpad permissions
        • Template reuse
      • JavaScript
        • The Launchpad JavaScript build system
        • Integration testing in JavaScript
        • Developing with YUI.Test
      • Static assets
        • CSS
        • Using CSS sprites
        • Favicons: Why so many files and what do they do?
        • Images
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JavaScript¶

Launchpad’s front end is built using the YUI 3 library and ships its JavaScript through a custom build system.

  • The Launchpad JavaScript build system
  • Integration testing in JavaScript
  • Developing with YUI.Test
Copyright © 2026 CC-BY-SA, Canonical Ltd.
Last updated on Jun 19, 2026
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