I. Overview
- What is Angular
- AngularJS and Angular relationship
- Angular features
- Angular History
- Angular learning advice
Two What is Angular
- Angular (pronounced [ˈæŋɡjələr]) is a javaScript framework for building user interfaces. Developed and maintained by Google, it is mainly used to develop single-page applications
- Similar to Vue.js (MVVM data-driven view ideas, componentization, modularization, instructions, etc.)
- Developed and maintained by Google
- Develop Single Page Applications (SPA)
Three AngularJS and Angular relationship
| AngularJS | Angular | |
|---|---|---|
| website | https://angularjs.org/ | https://angular.io/ |
| interface |  |
 |
Four Angular features
Similar to Vue.js, it has the following features:
- MVVM
- Componentization
- Modular
- instruction
- Serve
- dependency injection
- TypeScript
- …
Five Angular development history
5.1 Origin
- In 2009, Misko hevery and Adam abrons built GetAngular in their spare time
- Misko hevery took over Feedback, a project within Google, which has reached 17,000 lines of code after 6 months of iteration. The development and maintenance of the project becomes very difficult. So Misko decided to rewrite the project with GetAngular
- The result is that the guy succeeded. After using GetAngular , the project was reduced from 17,000 lines to 1,500 lines, and it took only three weeks before and after.
- The leader of Misko saw that the young man is amazing, and also saw the commercial value brought by GetAngular , so he decided to formally establish GetAngular as a project and organize a full-time team to develop and maintain it.
- Abrons later left the project, but Hevery and some Google employees such as Igor Minar and Vojta Jina, who worked at Google, continued to develop and maintain this library
- Since it is no longer a personal project, the development team renamed GetAngular to AngularJS
5.2 AngularJS development iteration
So far, AngularJS has entered a long development iteration stage
- After 3 years of development, AugularJS was officially launched in June 2012, version 1.0.0
- AngularJS versions after 1.2 no longer support IE6 and 7
- AngularJS no longer supports IE8 after 1.3
- AngularJS added a component-like development method in 1.5 (to pave the way for the transition to Angular2)
- AngularJS 1.xx is currently released to 1.8.3 and will stop maintenance in 2022
5.3 Dilemma
- The much-maligned performance issue (dirty checking)
- Behind the current Web development concept (such as componentization, modular support is not good)
- Not friendly enough for mobile support
5.4 Angular2 Turned Out
- Angular 1.x is almost impossible to refactor because of too many problems and too much historical burden
- However, as early as March 2014, the official blog mentioned the plan to develop a new version of Angular
- At a conference in late September 2014, Angular2 officially debuted
- On September 15, 2016, Angular2 was officially released
- Since ng2 almost completely rewrites ng1, the official version after 2 is called Angular
- Logo after Angular2:
A
5.5 Angular1 upgrade to Angular2? (ng2 compared to ng1)
- Removed the control+$scope design method, and switched to the current mainstream component-based construction
- Better performance than ng1
- Design for mobile first
- More in line with future standards (EcmaScript 6, Web Component)
- TypeScript
- Anyway, it is more modern and better
5.6 Status
- Since Angular2, the official promises that subsequent versions will be compatible with Angular2
- The latest Angular release version is v16.xx
- The new version of Angular is also harvested on GitHub
88k+ - Less usage than React and Vue
Six Angular learning suggestions
- Read the official documentation
- Write demo test
- Write small projects to practice
- Participate in actual project development experience
- Over time...