Web Component Development Using Servlet & JSP Technologies (EE6) - Chapter 3 - Implementing an MVC Design
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MVC Pattern stands for Model-View-Controller Pattern. This pattern is used to separate application's concerns. Model - Model represents an object or JAVA POJO carrying data. It can also have logic to update controller if its data changes. View - View represents the visualization of the data that model contains. Controller - Controller acts on both model and view. It controls the data flow into model object and updates the view whenever data changes. It keeps view and model separate.
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This document provides an introduction to authentication and authorization in Angular applications. It discusses authentication as validating users through credentials like username and password, while authorization controls user access permissions. JSON web tokens (JWTs) are then introduced as a way to securely transmit information to authenticate users between the client and server. The structure and usage of JWTs is explained, including how the header, payload, and signature parts work with base64 encoding and HMAC algorithms. Finally, local storage methods for storing user data in the browser are reviewed.
Angular - Chapter 7 - HTTP Services
Http Service will help us fetch external data, post to it, etc. We need to import the http module to make use of the http service. Let us consider an example to understand how to make use of the http service.
Angular - Chapter 6 - Firebase Integration
AngularFire is the officially supported AngularJS binding for Firebase. ... The focus of this library is to abstract much of the boilerplate involved in creating Angular bindings from Firebase to Angular, and to make it easy to create services that sync to your database.
Angular - Chapter 5 - Directives
A directive is a custom HTML element that is used to extend the power of HTML. Angular 2 has the following directives that get called as part of the BrowserModule module.
ngif
ngFor
If you view the app.module.ts file, you will see the following code and the BrowserModule module defined. By defining this module, you will have access to the 2 directives.
Angular - Chapter 4 - Data and Event Handling
The document provides information about Angular data binding and event handling. It discusses how interpolation can be used to connect data from a component class to its template. It also explains how property binding and event binding allow two-way communication between the component class and template. Finally, it introduces ngModel for setting up two-way data binding between an input element and a property.
Angular - Chapter 3 - Components
Components are the most basic UI building block of an Angular app. An Angular app contains a tree of Angular components.
Angular components are a subset of directives, always associated with a template. Unlike other directives, only one component can be instantiated per an element in a template.
A component must belong to an NgModule in order for it to be available to another component or application. To make it a member of an NgModule, list it in the declarations field of the NgModule metadata.
Angular - Chapter 2 - TypeScript Programming
TypeScript lets you write JavaScript the way you really want to. TypeScript is a typed superset of JavaScript that compiles to plain JavaScript. TypeScript is pure object oriented with classes, interfaces and statically typed like C# or Java. The popular JavaScript framework Angular 2.0 is written in TypeScript. Mastering TypeScript can help programmers to write object-oriented programs and have them compiled to JavaScript, both on server side and client side.
Angular - Chapter 1 - Introduction
AngularJS is a structural framework for dynamic web apps. It lets you use HTML as your template language and lets you extend HTML's syntax to express your application's components clearly and succinctly. AngularJS's data binding and dependency injection eliminate much of the code you would otherwise have to write. And it all happens within the browser, making it an ideal partner with any server technology.
JavaScript - Chapter 10 - Strings and Arrays
JavaScript String:
The String object lets you work with a series of characters; it wraps Javascript's string primitive data type with a number of helper methods.
As JavaScript automatically converts between string primitives and String objects, you can call any of the helper methods of the String object on a string primitive.
JavaScript Arrays:
The Array object lets you store multiple values in a single variable. It stores a fixed-size sequential collection of elements of the same type. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type.
JavaScript - Chapter 15 - Debugging Techniques
Debugging in JavaScript
It is common to have errors while writing codes and the errors can be due to syntax or logical. These errors create a lot of ambiguity in the logic and understanding of both users and programmers. There can also be errors in the code which can remain invisible to the programmer’s eye and can create havoc. To identify these errors we need Debuggers that can go through the entire code or program, identify the errors and also fix them.
-Debugger
The debugger keyword is used in the code to force stop the execution of the code at a breaking point and calls the debugging function. The debugger function is executed if any debugging is needed at all else no action is performed.
JavaScript - Chapter 14 - Form Handling
Form validation normally used to occur at the server, after the client had entered all the necessary data and then pressed the Submit button. If the data entered by a client was incorrect or was simply missing, the server would have to send all the data back to the client and request that the form be resubmitted with correct information. This was really a lengthy process which used to put a lot of burden on the server.
JavaScript provides a way to validate form's data on the client's computer before sending it to the web server. Form validation generally performs two functions.
Basic Validation − First of all, the form must be checked to make sure all the mandatory fields are filled in. It would require just a loop through each field in the form and check for data.
Data Format Validation − Secondly, the data that is entered must be checked for correct form and value. Your code must include appropriate logic to test correctness of data.
JavaScript - Chapter 13 - Browser Object Model(BOM)
The Browser Object Model (BOM) in JavaScript includes the properties and methods for JavaScript to interact with the web browser.
BOM provides you with window object, for example, to show the width and height of the window. It also includes the window.screen object to show the width and height of the screen.
JavaScript - Chapter 12 - Document Object Model
What is the DOM?
The DOM is a W3C (World Wide Web Consortium) standard.
The DOM defines a standard for accessing documents:
"The W3C Document Object Model (DOM) is a platform and language-neutral interface that allows programs and scripts to dynamically access and update the content, structure, and style of a document."
The W3C DOM standard is separated into 3 different parts:
Core DOM - standard model for all document types
XML DOM - standard model for XML documents
HTML DOM - standard model for HTML documents
The HTML DOM (Document Object Model)
When a web page is loaded, the browser creates a Document Object Model of the page.
The HTML DOM model is constructed as a tree of Objects.
With the HTML DOM, JavaScript can access and change all the elements of an HTML document.
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- 1. Web Component Development with Servlet & JSP Technologies (EE 6) Module-3: Implementing an MVC Design Team Emertxe
- 2. www.webstackacademy.com Objectives Upon completion of this module, you should be able to: ● Implement the controller design using a Servlet ● Implement the model design using a POJO ● Implement the view design element using a JSP and the expression language(EL) ● Connect the model view and controller element to implement a working MVC solution
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- 7. Web Stack Academy (P) Ltd #83, Farah Towers, 1st floor,MG Road, Bangalore – 560001 M: +91-80-4128 9576 T: +91-98862 69112 E: info@www.webstackacademy.com www.webstackacademy.com