Angular JS is a front-end framework for web applications. It allows you to extend HTML’s syntax to present dynamic content through two-way data-binding.

• Angular directives are special commands used within the framework
• All directives start with ‘ng-‘ then the name of the directive
• Expressions are written in the HTML and are wrapped with {{ }} which is used to add JavaScript within the HTML
• Two-way data binding ties the view and model together
• Angular is used for the view in MVC architecture
  • M is for model (or data)
  • V is for view
  • C is for controller (JavaScript that links your data to your template, creates the interaction between your model and your views)
• Modules are specific JavaScript files used to take care of different tasks
• Service is a small piece of code that takes care of common tasks
• $http is a service that handles communications between an http server and your application
• Deep linking looks at the location URL and manages how it maps to the current state of the page
• $scope service allows you to pass variables between the JS and the HTML

Directives for form validations:

• ng-required
• ng-minlength
• ng-maxlength
• ng-pattern

Properties for the models:

• $pristine (class ng-pristine)
• $dirty (class ng-dirty)
• $touched (class ng-touched)
• $valid (class ng-valid)
• $invalid (class ng-invalid)