SharePoint Framework v1.12.1 release notes

This release introduces a new property & event in the Web Part API to detect the rendering width (and changes), improved support for Microsoft Teams solutions, and updates supported versions of Node.js.

Released: April 28, 2021


This page addresses details related to a specific SPFx release version. This page doesn't include additional SPFx prerequisites that must be installed in order to develop SPFx solutions, including Node.js, Yeoman, and other tools.

To learn more about these prerequisites, see Set up your SharePoint Framework development environment.

Upgrading projects from v1.11.0 to v1.12.1

In the project's package.json file, identify all SPFx v1.11.0 packages. For each SPFx package:

  1. Uninstall the existing v1.11.0 package:

    npm uninstall @microsoft/{spfx-package-name}@1.11.0
  2. Install the refreshed v1.12 {version-release} package:

    npm install @microsoft/{spfx-package-name}@1.12.1 --save --save-exact


The CLI for Microsoft 365 provides an easy step-by-step guidance to upgrade your solutions to latest SharePoint Framework version.

New features and capabilities

  • The Sync to Teams button in the Tenant App Catalog will use the Teams app manifest defined in the solution if present to create and publish a Teams app package to Microsoft Teams. If an app manifest file is not present, SharePoint will dynamically generate one.
  • A new API has been added to the SPFx web part class to determine the rendered width of a web part and optionally handle an event when it changes.
  • Expand list notifications to work for both lists and document libraries.
  • Preliminary support for Microsoft Teams meeting apps with the SharePoint Framework - full support is pending a fix for server side regression

Changes in this release

  • Add support for Node.js v12.13.x & v14.15.x
    • See Set up your SharePoint Framework development environment for details.
    • Gulp-CLI is strongly recommended. Our prior guidance was to install Gulp v3 or v4 globally, but the guidance from the Gulp team is to only install Gulp CLI globally. By using the Gulp CLI, you can have projects that use Gulp v3 and others that use Gulp v4.
  • For all projects:
  • For projects that use React:
    • Update the React NPM packages (react & react-dom) to v16.9.0.
    • Update the Office UI Fabric React NPM package / Microsoft Fluent UI (office-ui-fabric-react) to v7.156.0.
  • The default location for resources used in deployments changed from ./temp/deploy to ./releases/assets. For projects created prior to SPFx v1.12.1, you should update the ./config/deploy-azure-storage.json file property workingDir to the new location: "workingDir": "./release/assets/". For more information, see Deploy your SharePoint client-side web part to Azure CDN: Configure Azure Storage account details.

Deprecations and removed items in this release

  • Gulp v3 is not supported (neither globally nor locally installed) when using Node.js v12+.

  • Local workbench is deprecated - This is the last release that will include support for the local workbench.

  • This is the last release that will include a single generator that works for on-prem and SharePoint Online. You'll still be able to create projects for on-prem, just by using the older generator.

  • The gulp serve task has been deprecated and renamed to serve-deprecated. To address this, the gulpfile.js in new SPFx v1.12.1 projects has been updated to add an alias serve for the renamed serve-deprecated task. However, if you're upgrading a project to SPFx v1.12.1, you need to edit your gulpfile.js file so the task gulp serve will continue to work.

    When upgrading SPFx projects to v1.12.1, add the following before the line build.initialize(require('gulp'));:

    var getTasks = build.rig.getTasks;
    build.rig.getTasks = function () {
      var result =;
      result.set('serve', result.get('serve-deprecated'));
      return result;

Gulp versions & Node.js v12+

Gulp v3 isn't supported with Node.js v12+ (ref gulpjs/gulp/#2324).

This is not a change with SPFx. Its mentioned here to bring attention to it as this SPFx release adds support for Node.js v12.