[javascript] How is AngularJS different from jQuery

I only know one js library and that is jQuery.
But my other coders in the group are changing AngularJS as their default library in new project.

I don't know anything about it. How is it different from jQuery?
I already have a set of functions done for similar tasks in jQuery. Can I still use jQuery stuff with AngularJS?

I think this is a very good chart describing the differences in short. A quick glance at it shows most of the differences.

One thing I would like to add is that, AngularJS can be made to follow the MVVM design pattern while jQuery does not follow any of the standard Object Oriented patterns.

I want to add something regarding AngularJS difference with jQuery from a developer's perspective.

In AngularJS you have to have a very structured view and approach on what you want to accomplish. It is scarcely following a linear fashion to complete a task, but rather, the exchanges between various objects take care of the requests and actions, which, then, is necessary as angular is an MVC-Based framework. It also requires an at least general blueprint of the finalized application, since coding depends much on how you want the interactions to be completed.

jQuery is like a free poetry, you write lines and keep some relations and momentum appropriate for your task to be accomplished.

Though, in Angular JS, you should follow some rules as well as keeping the momentum and relations proper, maybe it is more like classical Spencerian sonnet (a famous classical poet) whose poem is structural and tied to many rules.

Compared against AngularJS, jQuery is more like a collection of codes and functions (which is, as already mentioned, great for DOM manipulation and fast-effect achievement), while AngularJS is a real framework which gives the developer the ability to build an enterprise web-application with a lot of data-binding and exchange within a superbly organized-routing and management.

Furthermore, AngularJS has no dependency on jQuery to complete its task. It has two very superb features which are not found in jQuery in any sense:

1- Angular JS teaches you how to CODE and accomplish a goal, not just accomplish a goal by any means. Worth to mention that AngularJS fully utilizes the core and heart of Javascripts and paves the way for you to incorporate in your app, the techniques such as DI (dependency-injection). To work with angularJS you should (or must) learn more elevated techniques of coding with Javascript.

2- Angular JS is fully independent to handle directives and structure your app; you might then simply claim that jQuery can do the same (independence), but, indeed, AngularJS, as several times mentioned within the above lines, has independence in the most excellent possible structurally MVC-Based way.

A last note is that, there is no war of Names, since it is far disturbing to be biased, or subjective. jQuery's magnitude and greatness has been proved, but their usages and limitations( of any framework or software) are the concerns of the discussion and similar debates around.

Update:

Using AngularJS is decisive as it is expensive in terms of implementation, but founds a strong base for future expansion, transformation and maintenance of the application. AngularJS is for the New World of Web. It is targeted toward building applications which are characterized by their least resource consumption (loading only necessary resources from the server), fast response time and high degree of maintainability and extendability wrapped around a structured system.

They work at different levels.

The simplest way to view the difference, from a beginner perspective is that jQuery is essentially an abstract of JavaScript, so the way we design a page for JavaScript is pretty much how we will do it for jQuery. Start with the DOM then build a behavior layer on top of that. Not so with Angular.Js. The process really begins from the ground up, so the end result is the desired view.

With jQuery you do dom-manipulations, with Angular.Js you create whole web-applications.

jQuery was built to abstract away the various browser idiosyncracies, and work with the DOM without having to add IE6 checks and so on. Over time, it developed a nice, robust API which allowed us to do a lot of things, but at its core, it is meant for dealing with the DOM, finding elements, changing UI, and so on. Think of it as working directly with nuts and bolts.

Angular.Js was built as a layer on top of jQuery, to add MVC concepts to front end engineering. Instead of giving you APIs to work with DOM, Angular.Js gives you data-binding, templating, custom components (similar to jQuery UI, but declarative instead of triggering through JS) and a whole lot more. Think of it as working at a higher level, with components that you can hook together, instead of directly at the nuts and bolts level.

Additionally, Angular.Js gives you structures and concepts that apply to various projects, like Controllers, Services, and Directives. jQuery itself can be used in multiple (gazillion) ways to do the same thing. Thankfully, that is way less with Angular.Js, which makes it easier to get into and out of projects. It offers a sane way for multiple people to contribute to the same project, without having to relearn a system from scratch.

A short comparison can be this-

jQuery

• Can be easily used by those who have proper knowledge on CSS selectors
• It is a library used for DOM Manipulations
• Has nothing to do with models
• Easily manipulate the contents of a webpage
• Apply styles to make UI more attractive
• Easy DOM traversal
• Effects and animation
• Simple to make AJAX calls and
• Utilities usability
• don't have a two-way binding feature
• becomes complex and difficult to maintain when the size of a project increases
• Sometimes you have to write more code to achieve the same functionality as in Angular.Js

Angular.Js

• It is an MVVM Framework
• Used for creating SPA (Single Page Applications)
• It has key features like routing, directives, two-way data binding, models, dependency injection, unit tests etc
• is modular
• Maintainable, when project size increases
• is Fast
• Two-Way data binding REST friendly MVC-based Pattern
• Deep Linking
• Templating
• Build-in form Validation
• Dependency Injection
• Localization
• Full Testing Environment
• Server Communication

And much more

Think this helps.

More can be found-

• jQuery vs. AngularJS: A Comparison and Migration Walkthrough
• "Thinking in AngularJS" if I have a jQuery background?
• What are the key differences between jQuery and AngularJS?
• jQuery Vs AngularJS – A Good Comparison
• What is the difference between jQuery and AngularJS?

Jquery :-

jQuery is a lightweight and feature-rich JavaScript Library that helps web developers
by simplifying the usage of client-side scripting for web applications using JavaScript.
It extensively simplifies using JavaScript on a website and it’s lightweight as well as fast.

So, using jQuery, we can:

easily manipulate the contents of a webpage
apply styles to make UI more attractive
easy DOM traversal
effects and animation
simple to make AJAX calls and
utilities and much more… 

AngularJS :-

AngularJS is a product by none other the Search Engine Giant Google and it’s an open source
MVC-based framework(considered to be the best and only next generation framework). AngularJS
is a great tool for building highly rich client-side web applications.

As being a framework, it dictates us to follow some rules and a structured approach. It’s
not just a JavaScript library but a framework that is perfectly designed (framework tools
are designed to work together in a truly interconnected way).

In comparison of features jQuery Vs AngularJS, AngularJS simply offers more features:

Two-Way data binding
REST friendly
MVC-based Pattern
Deep Linking
Template
Form Validation
Dependency Injection
Localization
Full Testing Environment
Server Communication

AngularJS : AngularJS is for developing heavy web applications. AngularJS can use jQuery if it’s present in the web-app when the application is being bootstrapped. If it's not present in the script path, then AngularJS falls back to its own implementation of the subset of jQuery.

JQuery : jQuery is a small, fast, and feature-rich JavaScript library. It makes things like HTML document traversal and manipulation, event handling, animation, and Ajax much simpler. jQuery simplifies a lot of the complicated things from JavaScript, like AJAX calls and DOM manipulation.

Read more details here: angularjs-vs-jquery