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What's New in Angular 8? [Angular 8 New Features]

Angular 8 is the smaller, faster, and easier to use and it will be making Angular developers life easier.
What's New in Angular 9? [Angular 9 New Features]

The latest features introduced during the Angular 8 release candidate stage include:

1.            Smaller bundles, CLI APIs, and alignment with the ecosystem
2.            AngularJs Migration Improvements
3.            Route Configurations use Dynamic Imports
4.            Differential Loading by Default
5.            Web Worker Support
6.            New Deprecation Guide
7.            Builder APIs in the CLI
8.            Workspace APIs in the CLI
9.            Ivy & Bazel
10.       Ivy aims to change this. Compared with the current Angular View Engine, Ivy provides the following benefits.
                                                                                i.      Generated code that is easier to read and debug at runtime
                                                                              ii.      Faster re-build time
                                                                            iii.      Improved payload - applications size improvements
                                                                            iv.      Improved template type checking
                                                                              v.      Great backward compatibility

Differential loading of modern JavaScript:- 
Use “ngx-build-modern”: Differential Serving for Angular and the CLI.

Must be:-
1.            Angular >= 7.0.0
2.            Angular CLI >= 7.0.0

The important features of “ngx-build-modern”:-
·       Create optimized bundles for modern browsers
·       Create legacy bundles for older browsers
·       Make the browser loads the right set of bundles
·       Automate this all by providing a CLI extension


For more detail about – ngx-build-modern

This release contains the following added and Improvements over the entire Angular platform including:-
=> Added Support for TypeScript 3.2
=> Added a Navigation Type Available during Navigation in the Router
=> Added pathParamsOrQueryParamsChange mode for runGuardsAndResolvers in the Router
=> Allow passing state to routerLink Directives in the Router
=> Allow passing state to NavigationExtras in the Router
=> Restore the whole object when navigating back to a page managed by Angular Router
=> Added support for SASS
=> Resolve generated Sass/Less files to .css inputs

=> Added Predicate function mode for runGuardsAndResolvers:-
This option means guards and resolvers will ignore changes when a provided predicate function returns `false`. This supports use cases where an application needs to ignore some param updates but not others.
For example, changing a sort param in the URL might need to be ignored, whereas changing the `project` param might require re-run of guards and resolvers.

=> Added functionality to mark control and its descendant controls as touched: - add markAllAsTouched () to AbstractControl

=> Added ng-new command that builds the project with Bazel

=> Use image based cache for windows BuildKite

=> Export NumberValueAccessor & RangeValueAccessor directives

=> Use shared DomElementSchemaRegistry instance for improving performance of platform-server (@angular/platform-server):-
Right now the ServerRendererFactory2` creates a new instance of the `DomElementSchemaRegistry` for each and every request, which is quite costly (for the Tour of Heroes SSR example this takes around **15%** of the overall execution time)

=> Now the Performance Improvements on the core, more consistent about “typeof checks”: -
When testing whether `value` is an object, use the ideal sequence of strictly not equal to `null` followed by `typeof value === 'object'` consistently. Specifically, there's no point in using double equal with `null` since `undefined` is ruled out by the `typeof` check.

Also avoid the unnecessary ToBoolean check on `value.ngOnDestroy` in `hasOnDestroy()`, since the `typeof value.ngOnDestroy === 'function'` will only let closures pass and all closures are truish (with the notable exception of `document.all`, but that shouldn't be relevant for the `ngOnDestroy` hook)

=> In the Compiler-CLI, expose ngtsc as a TscPlugin

=> Restore the whole object when navigating back to a page managed by Angular Router:-
This feature adds a few capabilities. First, when a `popstate` event fires the value of `history.state` will be read and passed into `NavigationStart`. In the past, only the `navigationId` would be passed here.

Additionally, `NavigationExtras` has a new public API called `state` which is an object that will be stored as a value in `history.state` on navigation.

For example, the object `{foo: 'bar'}` will be written to `history.state` here: -`router.navigateByUrl('/simple', {state: {foo: 'bar'}});`

By Anil Singh | Rating of this article (*****)

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