JQuery
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This document discusses jQuery, a JavaScript library that simplifies HTML document manipulation and user interaction. It allows selecting elements, modifying content and styling, handling events, and using AJAX. Some key benefits are cross-browser support, CSS-like syntax, and an active developer community. Examples provided demonstrate using jQuery for forms, chatboxes, menus, animations and more. Selectors allow finding elements by ID, class, type and other attributes. Events like click can have functions attached. jQuery is used by many large companies and helps abstract away browser differences.
JQuery
- 2. Disclaimer: This presentation is prepared by trainees of baabtra as a part of mentoring program. This is not official document of baabtra –Mentoring Partner Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt . Ltd
- 3. jQuery Validation Atheendrh Kakkothh atheendrh@gmail.com www.facebook.com/atheend rhkakkoth twitter.com/username in.linkedin.com/in/atheendr h kakkoth 9633734876
- 4. Week Target Achieved 1 30 28 2 3 Typing Speed
- 5. What is jQuery? • JavaScript Library • jQuery is a lightweight, "write less, do more", JavaScript library. • The purpose of jQuery is to make it much easier to use JavaScript on your website • The jQuery library contains the following features: HTML/DOM manipulation CSS manipulation HTML event methods Effects and animations AJAX
- 6. Why jQuery? • Cross-browser support (IE 6.0+, FF 1.5+, Safari 2.0+, Opera 9.0+) • CSS-like syntax – easy for developers/non- developers to understand • Active developer community
- 7. JQuery • Powerful JavaScript library – Simplify common JavaScript tasks – Access parts of a page • using CSS or XPath-like expressions – Modify the appearance of a page – Alter the content of a page – Change the user’s interaction with a page – Add animation to a page – Provide AJAX support – Abstract away browser quirks
- 8. A Few Examples • Forms • Chatboxes • Menus • Dropdowns • Sliders • Tabs • Slideshows • Games
- 9. Using jQuery • Adding jQuery to Your Web Pages There are several ways to start using jQuery on your web site. You can: Download the jQuery library from jQuery.com Include jQuery from the file <head> <script src="jquery-1.10.2.min.js"></script> </head>
- 10. The Document Ready Event • You might have noticed that all jQuery methods in our examples, are inside a document ready event: • This is to prevent any jQuery code from running before the document is finished loading (is ready). • This also allows you to have your JavaScript code before the body of your document, in the head section. $(document).ready(function(){ // jQuery methods go here... });
- 11. jQuery Selectors • jQuery selectors allow to select and manipulate HTML element(s). • jQuery selectors are used to "find" (or select) HTML elements based on their id, classes, types, attributes, values of attributes and much more. It's based on the existing CSS Selectors, and in addition, it has some own custom selectors. • All selectors in jQuery start with the dollar sign
- 12. The #id Selector The jQuery #id selector uses the id attribute of an HTML tag to find the specific element. An id should be unique within a page, so you should use the #id selector when you want to find a single, unique element. To find an element with a specific id, write a hash character, followed by the id of the element: $("#test") The element Selector jQuery element selector selects elements based on the element name. You can select all <p> elements on a page like this: $("p") The .class Selector The jQuery class selector finds elements with a specific class. To find elements with a specific class, write a period character, followed by the name of the class: $(".test")
- 13. What are Events? • All the different visitor's actions that a web page can respond to are called events. • An event represents the precise moment when something happens. • Examples: moving a mouse over an element selecting a radio button clicking on an element Click() event $("p").click(function(){ $(this).hide(); });
- 14. Form.php
- 17. jQuery Animations • Animations • Built in – fadeIn() – fadeOut() – hide() – show() – slideDown() – slideUp() – toggle() – slideToggle() – fadeTo() – animate() • See also: – Easing Plug-in – jQuery User Interface: http://ui.jquery.com
- 18. Who’s using jQuery? • Google • Dell • Bank of America • Mozilla • NetFlix • NB
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