Shim to insulate apps from spec changes and prefix differences. Latest adapter.js release:
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Latest commit e1eefbf Aug 3, 2018

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WebRTC adapter

adapter.js is a shim to insulate apps from spec changes and prefix differences. In fact, the standards and protocols used for WebRTC implementations are highly stable, and there are only a few prefixed names. For full interop information, see



npm install webrtc-adapter


bower install webrtc-adapter



Copy to desired location in your src tree or use a minify/vulcanize tool (node_modules is usually not published with the code). See webrtc/samples repo as an example on how you can do this.

Prebuilt releases


In the gh-pages branch prebuilt ready to use files can be downloaded/linked directly. Latest version can be found at Specific versions can be found at, e.g.


You will find adapter.js in bower_components/webrtc-adapter/.


In node_modules/webrtc-adapter/out/ folder you will find 4 files:

  • adapter.js - includes all the shims and is visible in the browser under the global adapter object (window.adapter).
  • adapter_no_edge.js - same as above but does not include the Microsoft Edge (ORTC) shim.
  • adapter_no_edge_no_global.js - same as above but is not exposed/visible in the browser (you cannot call/interact with the shims in the browser).
  • adapter_no_global.js - same as adapter.js but is not exposed/visible in the browser (you cannot call/interact with the shims in the browser).

Include the file that suits your need in your project.


Detailed information on developing in the webrtc github repo can be found in the WebRTC GitHub repo developer's guide.

Head over to test/ and get started developing.

Publish a new version

  • Go to the adapter repository root directory
  • Make sure your repository is clean, i.e. no untracked files etc. Also check that you are on the master branch and have pulled the latest changes.
  • Depending on the impact of the release, either use patch, minor or major in place of <version>. Run npm version <version> -m 'bump to %s' and type in your password lots of times (setting up credential caching is probably a good idea).
  • Create and merge the PR if green in the GitHub web ui
  • Go to the releases tab in the GitHub web ui and edit the tag.
  • Add a summary of the recent commits in the tag summary and a link to the diff between the previous and current version in the description, example.
  • Go back to your checkout and run git pull
  • Run npm publish (you need access to the webrtc-adapter npmjs package)
  • Done! There should now be a new release published to NPM and the gh-pages branch.

Note: Currently only tested on Linux, not sure about Mac but will definitely not work on Windows.

Publish a hotfix patch versions

In some cases it may be necessary to do a patch version while there are significant changes changes on the master branch. To make a patch release,

  • checkout the latest git tag using git checkout tags/vMajor.minor.patch.
  • checkout a new branch, using a name such as patchrelease-major-minor-patch.
  • cherry-pick the fixes using git cherry-pick some-commit-hash.
  • run npm version patch. This will create a new patch version and publish it on github.
  • check out origin/bumpVersion branch and publish the new version using npm publish.
  • the branch can now safely be deleted. It is not necessary to merge it into the main branch since it only contains cherry-picked commits.