Q51. What was new in Angular 2?
Q52. What was new in Angular 4?
Q53. What was new in Angular 5?
Q54. What was new in Angular 6?
Q55. What was new in Angular 7?
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Q51. What was new in Angular 2?
“<ng-template #myFalsyTemplate>Else Html</ng-template>”
Q52. What was new in Angular 4?
Q53. What was new in Angular 5?
Q54. What was new in Angular 6?
Q55. What was new in Angular 7?
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Q51. What was new in Angular 2?
Answer:
- Released in 2016
- Complete rewrite of Angular 1
- Written entirely in typescript
- Component-based instead of Controller
- ES6 and typescript supported
- More testable as component-based
- Support for Mobile/Low-end devices
- Up to typescript 1.8 is supported
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Q52. What was new in Angular 4?
Answer:
- Released in 2017
- Changes in core library
- Angular 4 is simply the next version of angular 2, the underlying concept is the same & is an inheritance from Angular 2
- Lot of performance improvement is made to reduce size of AOT compiler generated code
- Typescript 2.1 & 2.2 compatible — all feature of ts 2.1 & 2.2 are supported in Angular 4 application
- Animation features are separated from @angular/core to @angular/animation — don’t import @animation packages into the application to reduce bundle size and it gives the performance improvement.
- Else block in *ngIf introduced: — Instead of writing 2 ngIf for else , simply add below code in component template:
“<ng-template #myFalsyTemplate>Else Html</ng-template>”
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Q53. What was new in Angular 5?
Answer:
// in component decorator you can now add:
“preserveWhitespaces: false”
// or in tsconfig.json:
“angularCompilerOptions”: { “preserveWhitespaces”: false}`
- Released 1st November 2017
- Build optimizer: It helps to removed unnecessary code from your application
- Angular Universal State Transfer API and DOM Support — By using this feature, we can now share the state of the application between the server side and client side very easily.
- Compiler Improvements: This is one of the very nice features of Angular 5, which improved the support of incremental compilation of an application.
- Preserve White space: To remove unnecessary new lines, tabs and white spaces we can add below code(decrease bundle size)
// in component decorator you can now add:
“preserveWhitespaces: false”
// or in tsconfig.json:
“angularCompilerOptions”: { “preserveWhitespaces”: false}`
- Increased the standardization across all browsers: For internationalization we were depending on `i18n` , but in ng 5 provides a new date, number, and currency pipes which increases the internationalization across all the browsers and eliminates the need of i18n polyfills.
- exportAs: In Angular 5, multiple names support for both directives and components
- HttpClient: until Angualar 4.3 @angular/HTTP was been used which is now depreciated and in Angular 5 a new module called HttpClientModule is introduced which comes under @angular/common/http package.
- Few new Router Life-cycle Events being added in Angular 5: In Angular 5 few new life cycle events being added to the router and those are:
- Angular 5 supports TypeScript 2.3 version.
- Improved in faster Compiler support:
- A huge improvement made in an Angular compiler to make the development build faster. We can now take advantage of by running the below command in our development terminal window to make the build faster.
https://softmindit.blogspot.com/2020/07/difference-among-angular-8-7-6-5-4-3-2.html?showComment=1594697757998#c2893770121053692592
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Q54. What was new in Angular 6?
— Angular CLI
— Angular Material + CDK
All of the above are now version 6.0.0, minor and patch releases though are completely independent and can be changed based on a specific project.
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Q54. What was new in Angular 6?
Answer:
- Released on April 2018
- This release is focused less on the underlying framework, and more on tool-chain and on making it easier to move quickly with angular in the future
- No major breaking changes
- Dependency on RxJS 6 (this upgrade have breaking changes but CLI command helps in migrating from older version of RxJS)
- Synchronizes major version number of the:
— Angular CLI
— Angular Material + CDK
All of the above are now version 6.0.0, minor and patch releases though are completely independent and can be changed based on a specific project.
- Remove support for <template> tag and “<ng-template>” should be used.
- Registering provider: To register new service/provider, we import Service into module and then inject in provider array. e.g:
- // app.module.ts
- import {MyService} from './my-service';
- ...
- providers: [...MyService]
- ...
- But after this upgrade you will be able to add providedIn property in injectable decorator. e.g:
- // MyService.ts
- @Injectable({ providedIn: 'root'})
- export class MyService{}
- CLI Changes: Two new commands have been introduced
- — ng update <package>
- * Analyse package.json and recommend updates to your application
- * 3rd parties can provide update scripts using schematics
- * automatically update code for breaking changes
- * staying update and low maintenance
- — ng add
- * add new capablities to your applicaiton
- * e.g ng add @angular/material : behind the scene it add bit of necessary code and changes project where needed to add it the thing we just told it to add.
- * Now adding things like angular material, progressive web app, service workers & angular elements to your existing ng application will be easy.
- It uses angular.json instead of .angular-cli.json
- Support for multiple projects: Now in angular.json we can add multiple projects
- CLI + Material starter templates: Let angular create code snippet for your basic components. e.g:
- — Material Sidenav
- * ng generate @angular/material:material-nav — name=my-nav
- Generate a starter template including a toolbar with app name and then the side navigation & it's also responsive
- — Dashboard
- * ng generate @angular/material:material-dashboard — name=my-dashboard
- Generates Dynamic list of cards
- — Datatable
- * ng generate @angular/material:material-table — name=my-table
- Generates Data Table with sorting, filtering & pagination
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Q55. What was new in Angular 7?
Answer:
ok