“We’ll probably [offer] a release candidate next month and then fix a bunch of bugs in the following month,” Brad Green, Google engineering director, said Thursday afternoon at Microsoft’s Build conference in San Francisco. A release candidate is the last stage before a general release.
Developers in charge of the project would have loved for it to be out by now, he said. “We certainly know there’s a lot of people who want it.” The framework, also known as AngularJS, has featured dependency injection for components and turning of static HTML content into dynamic content.
Angular 2: better rendering
A highlight of the release is improved rendering. “Already in Angular 2, we’re dramatically faster than Angular 1 in our rendering capabilities,” Green said. Right now, Angular 2 runs 2.5 times faster out of the box than Angular 1; the goal is to be five times faster. To provide an upgrade path, the ng-upgrade capability enables mixing of Angular 2 components and services into an existing Angular 1 application.
Now in a beta release stage, Angular 2 already is in use at organizations such as Internet weather service Weather Underground and NPR, said Green.
Written in TypeScript, Angular 2 is decoupled from the DOM renderer and allows for multiple renderers; this required a rewrite of the framework, Green noted. “In Angular 2, we have pluggable renderers,” including versions for Android, iOS, and React Native, he said.
Angular 2: Web apps
Google’s Angular Universal features decoupling from the DOM renderer as part of the effort to support Google and Mozilla’s Progressive Web Apps project and provide a more native-like user experience for mobile Web apps. With decoupling, when a user makes a request, content is rendered via HTML and CSS, reducing size and improving speed.
To improve responsiveness, Angular 2 can render across Web Workers, allowing Web content to run scripts in background threads. Code and most of Angular is moved to a Web Worker off the main UI thread for a smoother experience, Green said.