Javascript

( ** Full Stack Web Development Training: https://www.edureka.co/masters-program/full-stack-developer-training ** ) This Edureka tutorial on JavaScript explains all the fundamentals of JavaScript with examples. It also explains various features and applications of JavaScript. Following are the topics included in this tutorial: 1. What Is JavaScript? 2. Why Use JavaScript 3. JavaScript Fundamentals - Data Types - Variables - Constants - Loops - Conditional Statements - Functions

JavaScript is a scripting language used primarily for client-side web development. It is based on the ECMAScript standard but browsers support additional objects like Window and DOM objects. JavaScript can be used to create dynamic and interactive effects on web pages like menus, alerts, and updating content without reloading. It is commonly used for form validation, AJAX applications, and other interactive features. The document provides examples of basic JavaScript concepts like variables, data types, operators, and control structures and how to embed scripts in HTML.

This document provides an overview of JavaScript, including what it is, why it's used, who created it, its components and objects. JavaScript is a scripting language used primarily for client-side web page interactions. It allows adding dynamic and interactive elements to web pages. Some key points covered include: - JavaScript is used to specify webpage behavior and enable user interaction/effects. - It was created by Brendan Eich at Mozilla and allows both client-side and server-side scripting. - Common JavaScript objects include Document, Window, Math, Date and String. - Events, functions, variables and tags like <script> are JavaScript components. - The Document and Window

The document discusses the Document Object Model (DOM), which defines the logical structure of objects in an HTML document and how they can be manipulated with JavaScript. The DOM represents an HTML document as nodes and objects that can be accessed and modified with JavaScript. All HTML elements, text, and attributes can be accessed through the DOM to be modified, deleted, or have new elements created. Events allow scripts to run in response to user actions on a page.

JavaScript was designed to add interactivity to HTML pages. It is a scripting language that is usually embedded directly into HTML pages and allows for dynamic text, event handling, reading/writing HTML elements, and validating form data. JavaScript supports both client-side and server-side scripting and was originally developed by Netscape under the name LiveScript before being renamed. It provides programming capabilities to HTML authors and allows for dynamic content, user interaction, and validation without server requests.

This document provides an overview of web programming with JavaScript. It discusses topics like: - HTML and CSS which are used to structure and style web pages - How browsers interpret HTML, CSS, and JavaScript to display web pages - What backend and frontend development involve - Common JavaScript concepts like variables, operators, functions, and events - Tools that can be used for web development like text editors, browsers, and version control software - Resources for learning more about JavaScript and web programming

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JavaScript variables hold values and are declared with var. Variable names are case sensitive and must begin with a letter or underscore. Variables can hold numbers, strings, Booleans, objects, and null values. Arrays are objects that hold multiple values in a single variable. Functions are blocks of code that perform tasks and are executed by events or calls. Objects store related data and functions to represent self-contained entities.

This document provides an overview of JavaScript and the DOM (Document Object Model) for a web programming course. It introduces JavaScript as a scripting language used to add interactivity to HTML pages. It describes what JavaScript can do, such as dynamically updating text and reacting to events. It also covers JavaScript syntax, variables, operators, functions, and objects. A significant portion of the document is devoted to explaining the DOM and how it allows JavaScript to access and modify HTML elements and structure programmatically.

The document provides an overview of basic CSS (Cascading Style Sheets) concepts including what CSS is, why it is used, CSS syntax, selectors like element, class, ID and pseudo selectors, and common CSS properties for styling elements like color, background, fonts, text, lists, and borders. CSS is used to control the presentation and layout of HTML documents and is linked to HTML pages through <link> or <style> tags in the <head> section.

JavaScript - An Introduction is a beginner's guide to JavaScript. It starts with very basic level and goes to intermediate level. You'll be introduced with every language constructs, Event handling, Form handling and AJAX which is supported by JavaScript with XMLHttpRequest object. This XHR object is discussed in enough detail so that you can understand how the underlying AJAX functionality works in jQuery. At the end it discusses advance concepts and library build on/around JavaScript.

This document provides an introduction to JavaScript and its uses for web programming. It explains that JavaScript is a client-side scripting language that allows web pages to become interactive. Some key points covered include: - JavaScript can change HTML content, styles, validate data, and make calculations. - Functions are blocks of code that perform tasks when invoked by events or called in code. - Events like clicks or keyboard presses trigger JavaScript code. - The DOM (Document Object Model) represents an HTML document that JavaScript can access and modify. - Forms and user input can be accessed and processed using the DOM. - Programming flow can be controlled with conditional and loop statements. -

This document discusses JavaScript events and event listeners. It begins with an introduction that defines events as notifications that specific actions occurred, like user or browser actions. Event handlers are scripts that are executed in response to events. Events can be used to trigger JavaScript code that responds to user interactions. The document then provides examples of common event types like onclick, onsubmit, onmouseover, onmouseout, focus, and blur. It also discusses how to add and remove event listeners using addEventListener() and removeEventListener() methods. The document concludes with an example demonstrating how events can be used to change an HTML element in response to user clicks.

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This document provides an introduction to Cascading Style Sheets (CSS) including its syntax, types, selectors and an example program. CSS allows styling web pages by separating design from content. CSS rules consist of selectors and declaration blocks with properties and values. There are three types of CSS styles: internal, inline, and external. Common selectors include element, ID, class, and grouping selectors. An example program demonstrates using CSS to style an HTML table with borders, padding, and rounded corners.

This document provides an introduction to JavaScript and discusses its uses, places to insert code, variables, operators, and the Document Object Model (DOM). JavaScript is an object-based scripting language used mainly for client-side validation, dynamic drop-downs, displaying data and time, and pop-ups. Code can be inserted between HTML tags, in external JavaScript files, or between the <head> tags. The DOM represents the HTML document as a tree structure that can be modified.

The document discusses learning object oriented programming (OOP) in PHP. It provides an introduction to OOP principles in PHP and walks through 23 steps to create a PHP class called "person" with properties like name and methods like set_name() and get_name() to set and get the name property. It shows how to instantiate person objects, set their property values, and access the property values. The goal is to help readers understand the basics of building objects and classes in PHP OOP.

The document discusses various methods available in the Object namespace in Prototype.js, including clone(), extend(), inspect(), keys(), values(), and toJSON(). clone() performs a shallow copy of an object. extend() copies properties from one object to another. inspect() returns a string representation of an object. keys() and values() return arrays of an object's property names and values respectively. toJSON() returns a JSON string from an object.

A form provides an interface for users to input data into a web application. A form has attributes like action and method that specify where the data will be submitted and how. Common methods are GET, which appends data to the URL, and POST, which sends data in the HTTP request body. Form data is processed by another script, usually accessed via the action URL. Conditional statements like if/else control program flow based on evaluating conditions.

Arrays allow storing multiple values in a single variable. There are indexed arrays which use numeric indices and associative arrays which use named keys. Arrays can be defined using the array() function or by directly assigning values. Arrays can be looped through using foreach loops or functions like sizeof() to get the size. Multidimensional arrays store arrays within other arrays.

The document discusses PHP control structures and operators including switch-case statements, while loops, do-while loops, and for loops. The switch-case statement allows executing different code blocks based on different conditions. While and do-while loops repeat a block of code as long as or until a condition is true. The for loop is used when the number of iterations is known and repeats code a specific number of times.

This document discusses error handling in PHP. It begins by explaining the different types of errors in PHP - notices, warnings, and fatal errors. It then provides examples of how to control which errors are displayed to the user, define custom error handlers, trigger custom errors, and use exception handling with try/catch blocks. The key aspects covered are how to intercept errors gracefully and provide user-friendly messages.

JavaScript is a client-side scripting language that allows dynamic interactions and effects on web pages. It can be inserted directly into HTML code or linked via external .js files. The DOM (Document Object Model) represents an HTML or XML document as a tree structure, with nodes for elements, attributes, and text. This allows JavaScript to access and manipulate the content, structure, and styling of documents. Common JavaScript objects include String, Date, Array, and Math objects for manipulating text, dates, arrays of values, and mathematical operations respectively.

JavaScript is the primary scripting language of the web and is used to make web pages interactive. It can dynamically write and modify HTML content, react to user events like clicks, validate form data, detect the browser, and more. JavaScript code is commonly embedded directly in HTML using <script> tags and can also be stored externally in .js files. Key JavaScript concepts include variables, operators, conditional statements, functions, loops, and events.

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The document provides an overview of Dynamic HTML (DHTML) and its core technologies: HTML, CSS, JavaScript, and the DOM. It explains that DHTML allows dynamic and interactive web pages by combining these technologies. JavaScript is described as the scripting language that defines dynamic behavior, handling events and user interactions to manipulate the DOM. The document gives examples of common JavaScript functions, syntax elements, and how to incorporate JavaScript code into web pages.

Jquery is a JavaScript library that simplifies HTML document traversal, event handling, animating, and Ajax interactions. It is built on JavaScript and provides shortcuts and abstractions for many common tasks. Some key benefits of Jquery include providing cross-browser compatibility, an easy to use syntax, and a large number of plugins and functions to extend its capabilities.

The document provides an overview of JavaScript and the Document Object Model (DOM). It introduces JavaScript as a scripting language used to add interactivity and dynamic behavior to web pages. It describes how JavaScript can be implemented in HTML using <script> tags in the head or body, or externally in .js files. The document then covers JavaScript syntax including data types, operators, conditional statements, loops, functions. It also discusses the DOM and how JavaScript can manipulate HTML elements and attributes.

JavaScript is a client-side scripting language that adds interactivity to HTML pages. It can be embedded in HTML using <script> tags and scripts can be placed internally in the HTML file or externally in a .js file. JavaScript code can be inserted in the <head> or <body> sections, but is typically placed at the end of the <body> for faster page loads. Core JavaScript concepts include variables, objects, functions, operators, conditions, loops, and arrays. The DOM (Document Object Model) allows JavaScript to access and modify HTML elements on the page and events can be used to trigger JavaScript functions in response to user actions.

This document introduces JavaScript, covering what it is, what it can do, basic syntax, operators, and how to incorporate JavaScript into HTML pages. JavaScript is explained as the scripting language of the web that is used to add interactivity and dynamic behavior to HTML pages. The document outlines common JavaScript tasks like validating forms, detecting browsers, and creating cookies. It also covers JavaScript basics like variables, arithmetic and comparison operators, and logical operators. Examples are provided for how to write JavaScript code directly in HTML pages and access HTML elements and form values. The different types of JavaScript boxes - confirm, prompt, and alert - are also introduced.

This is our guide to javascript programming for the second year students of CSBN. Please download this as your reference for notes, as well as coverage for exam and quiz.

This document provides an introduction to JavaScript, covering its basics as a client-side scripting language, syntax, variables, conditionals, loops, functions, events, objects, AJAX functionality, and more. JavaScript can be used to add interactive elements to web pages without reloading, and uses standards like XMLHttpRequest to asynchronously exchange data with servers in the background. AJAX examples demonstrate how JavaScript can retrieve external data files to dynamically update page content.

JavaScript is a scripting language that allows adding interactivity to HTML pages. It works in all major browsers and can be used to validate form data, detect the visitor's browser, create cookies, and more. JavaScript's official name is ECMAScript and it is the most popular scripting language on the internet.

This document provides an overview of JavaScript fundamentals including: 1. A brief history of JavaScript including its development by Netscape and standardization by ECMA and W3C. 2. The uses of JavaScript including creating interactive pages, generating HTML dynamically, handling events, and enhancing browser capabilities. 3. Key JavaScript language features such as its object-based nature, syntax similar to C++ and Java, and platform independence. 4. How to include scripts in HTML using <script> tags and handling browsers that don't support scripts with <noscript>. 5. Details on variables and data types, operators, control structures, arrays, and functions in JavaScript.

This document provides an overview of JavaScript, including: - Its origins and development over time - How it can be used to make webpages dynamic and interactive - Key JavaScript concepts like variables, arrays, functions, and events - How it interacts with and manipulates the DOM - Its rebirth with the introduction of AJAX, which allows asynchronous data fetching and partial page updates

JavaScript is a programming language used to make web pages interactive. It allows calculations, form validation, games and other effects to be added to web pages. JavaScript code runs in the user's browser and works on any platform with a JavaScript-capable browser. Events like clicks or page loads can trigger JavaScript functions. JavaScript can be embedded directly in HTML pages or linked from external files and is commonly used to enhance user experience on websites.

Javascript allows interactive content on web pages and control of the browser and document. It is an interpreted scripting language that is cross-platform but support varies. Javascript can provide interactive content, control document appearance and content, and interact with the user through event handlers.

JavaScript is a programming language that allows web pages to be more interactive and dynamic. To add JavaScript to a web page, code is placed between opening and closing <script> tags, which can be inside the <head> or <body> sections. JavaScript code can either be directly written in the HTML file between <script> tags, or it can be saved in an external .js file and linked using the src attribute of the <script> tag. A basic "Hello World" JavaScript program uses the document.write() function to output text directly onto the web page. External JavaScript files allow code to be shared across multiple pages and edited in one place.

Scripts are programs or sequences of instructions that are interpreted by another program rather than directly by the processor. Popular scripting languages include JavaScript, Perl, and VBScript. JavaScript scripts can be used to create dynamic web pages and validate form data. To include JavaScript in an HTML document, the <script> tag is used with type="text/javascript". Variables are containers that store information in JavaScript and can be assigned values using operators like =, +, -, *, /, etc.

This document provides an outline and overview of client-side technologies including JavaScript, DOM, and jQuery. The outline covers JavaScript concepts like data types, control structures, arrays, functions, and objects. It also covers DOM levels and manipulating the DOM. Finally, it discusses jQuery and how to load, select elements, handle events, and more. The presentation aims to familiarize students with these important front-end technologies.

This document provides an outline and overview of client-side technologies including JavaScript, DOM, and jQuery. The outline includes sections on JavaScript concepts like data types, control structures, arrays, functions, and objects. It also covers DOM levels and manipulating the DOM, as well as introductions to jQuery for selecting elements, changing styles, and handling events. The presentation provides an overview of these key client-side technologies for students.

JavaScript with Syntax & Implementation JavaScript : Features Syntax JavaScript :Objects JavaScript :Properties JavaScript :Methods JavaScript :Events JavaScript :Functions JavaScript :Values Variables JavaScript :Expressions JavaScript :Operators output of each components

The document discusses the MySQL database design process. It covers defining keys to uniquely identify records, the different types of table relationships including one-to-one, one-to-many, and many-to-many, and the process of normalization to minimize duplication and inconsistencies. The three main levels of normalization discussed are first, second, and third normal forms, each with their own rules. Following proper database design, normalization, and defining relationships between tables is important for ensuring an efficient, flexible, and maintainable database structure.

The document describes a SimpleXML example that parses an XML file about a pet named Polly Parrot. It loads the XML file using simplexml_load_file(), then accesses the data within different elements like name, age, species, and parents using object notation. The script then modifies this data by assigning new values to the object properties and saves the changes back to the original XML file. Repeated elements like <sin> are represented as arrays and can be iterated over. Attribute values are accessed as array elements. Custom element collections can be created using XPath to select specific elements.

The document discusses string manipulation and regular expressions. It provides explanations of regular expression syntax including brackets, quantifiers, predefined character ranges, and flags. It also summarizes PHP functions for regular expressions like ereg(), eregi(), ereg_replace(), split(), and sql_regcase(). Practical examples of using these functions are shown.

SQLite is a file-based database engine that stores databases in files on disk. It supports databases up to 2TB in size and can be easily portable across platforms. SQLite is completely typeless, meaning fields do not need to be associated with a specific type. SQL commands are used to interact with SQLite databases from PHP. Queries return result objects that can be fetched and processed row by row or all at once to retrieve the full result set.

Session and cookies allow storing and retrieving data on the client-side. Sessions use a session ID to track user data across page requests. Cookies are stored in the browser and can persist longer than a session. The document provides examples of using sessions to track a counter and login information. It also demonstrates setting, retrieving, and deleting cookies to store form data between submissions.

This document describes how to build a simple RSS news aggregator using PHP, SQLite and XML. It includes code snippets to design a database to store RSS feed details, retrieve and parse feed data to display articles, and an administration interface to manage feeds. The aggregator allows users to select multiple RSS feeds, displays the latest stories from each feed, and has an admin panel to add, edit or remove feeds from the aggregator.

The document discusses functions in PHP, including defining functions, passing arguments to functions, returning values from functions, and using global variables. Some key points covered include: - Functions allow code to be reused and separated into logical subsections, making code more modular, readable, and maintainable. - Arguments passed to functions can make functions more flexible by allowing different inputs to produce different outputs each time they are called. - Functions can return values to the calling code using the return statement. Returned values can be variables, arrays, or results of calculations. - The order arguments are passed to a function matters, as arguments are assigned to placeholder variables in the defined order. Default values can be specified for arguments.

OOP in PHP allows for the creation of classes and objects. A class defines properties and methods, while an object is an instance of a class. Key OOP concepts include inheritance, where a child class extends a parent class; encapsulation, which hides internal data; and polymorphism through inheritance and method overriding. Exceptions can be thrown and caught to handle errors or unexpected behavior.