# What is new in this release?


#### All Projects
+ Replace @types/es6-collections with the typescript compiler's built-in es2015.collection library
+ Remove beta tags from some APIs that are now officially supported
#### @microsoft/sp-tslint-rules
+ Introduce a new "no-require-ensure" rule to facilitate deprecating require.ensure() in favor of the "import" keyword
#### @microsoft/sp-build-web
+ Enable build assets to be incorporated into the *.sppkg file and hosted by SharePoint  
#### @microsoft/sp-build-core-tasks
+ Add "asyncComponents" option to config.json. This setting can be used to avoid imports that would cause a library to be accidentally loaded synchronously instead of asynchronously
+ Deprecate the UNIT_TEST webpack macro, because this practice made it too easy to accidentally include test code in a production bundle
+ Fix an issue where the --locale parameter isn't respected
+ Add batching to dev-deploy and upload-cdn
+ Fix a minor issue with icon URL generation where icon URLs would be missing the CDN prefix
+ Introduce the ability to specify a relative path to an icon in a web part or extension manifest
+ Update webpack loaders to get rid of the deprecation warning
####  @microsoft/loader-cased-file
+ Update dependencies and fix a few issues that were causing warnings
####  @microsoft/generator-sharepoint
+ Update the generator work with older versions of the config.json file, because automatically upgrading it interfered with older branches such as on-premises
+ Include missing "ajv" dependency in the generated template
+ Remove outdated JSON schema settings
+ Fix an issue with parsing on-premises configuration files
+ Add missing tilde to libraries when generating client-side extension projects
+ Fix an issue where we appended "WebPart" to the class name twice when creating a web part with no template
+ Remove a heuristic that was removing parts of the component name, because customers found this confusing
+ Fix an issue where localization files for extensions were overwritten
+ Enable skipLibCheck to work around the inconsistent declarations of "WeakMap" in lodash and es2015.collection
+ Fix an issue with data bindings for the Knockout web part template
+ Add a suppression for the "CSS class 'ms-Grid' is not camelCase" warning caused by Fabric
+ Add launch.json and extensions.json to the generator SharePoint solution
+ Update the Yeoman generator to use sp-office-ui-fabric-core instead of directly referencing office-ui-fabric
+ Update generator's React typings to use a newer react-dom, and remove the deprecated react-addons packages
####  @microsoft/sp-client-preview
+ Replace @types/es6-collections with the typescript compiler's built-in es2015.collection library
####  @microsoft/sp-core-library
+ Deprecated IServiceCollection and UrlQueryParameterCollection
####  @microsoft/sp-http
+ Promote SPHttpClientBatch from @alpha to @beta
+ Initial beta release of SPHttpHeader enum and SPHttpClientResponse.correlationId property
#### @microsoft/sp-loader
+ Disallow loading of components built using SPFx preview releases prior to 1.0 
####  @microsoft/sp-module-interfaces
+ Add preloadListItemProperties to the preloadOptions section of the client-side application manifest
+ Add a "tags" property to the web part manifest
+ Introduce the ability to specify a relative path to an icon in a webpart or extension manifest
+ Enable the "preloadComponents" field to be used with other client-side component manifest types 
####  @microsoft/sp-webpart-base
+ Add shouldNotPersist to IWebPartPropertyMetadata to allow marking web part properties that should not persist on the server
+ Fix an issue where the property pane didn't refresh properly
+ Deprecate IWebPartContext
+ Fix an issue with ariaLabel functionality in property pane button
+ Fix an Internet Explorer compatibility issue when a checkbox has a long title
+ Remove @beta designation for WebPartContext
####  @microsoft/sp-lodash-subset
+ Add escaperegex() function
+ Use lodash-cli to significantly reduce the bundle size for sp-lodash-subset
+ Add find() function
####  @microsoft/sp-office-ui-fabric-core
+ Remove the Z-index support from sp-office-ui-fabric-core