JavaScript Frameworks: jQuery Overview
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Questions and Answers

What function would you use to add content to the beginning of selected elements in jQuery?

  • prepend() (correct)
  • before()
  • after()
  • append()

Which jQuery function removes selected elements from the document?

  • remove() (correct)
  • hide()
  • delete()
  • empty()

Which jQuery method allows you to run processing when the page has fully loaded?

  • document.ready()
  • load()
  • on()
  • ready() (correct)

What does the jQuery function fadeOut() do?

<p>Hides an element with a fade effect (D)</p> Signup and view all the answers

Which event method allows associating an event with a callback function in jQuery?

<p>on() (C)</p> Signup and view all the answers

Which of the following jQuery effects hides an element without any further modification?

<p>slideUp() (C)</p> Signup and view all the answers

What is the primary purpose of the animate() function in jQuery?

<p>Create custom animations (C)</p> Signup and view all the answers

Which method is NOT a jQuery DOM manipulation method?

<p>select() (A)</p> Signup and view all the answers

What characterizes a JavaScript library?

<p>It offers code reusability without changing an application's structure. (B)</p> Signup and view all the answers

Which of the following is NOT a feature of jQuery?

<p>Creating a new JavaScript framework (D)</p> Signup and view all the answers

How do you include jQuery in an HTML document?

<p>By adding a script tag with the jQuery file source. (B)</p> Signup and view all the answers

Which jQuery function is used to retrieve or modify the textual content of selected elements?

<p>text() (D)</p> Signup and view all the answers

What is the main advantage of using frameworks over libraries in JavaScript?

<p>Frameworks provide a predefined structure for applications. (C)</p> Signup and view all the answers

What is the correct jQuery syntax to select an element and apply an action?

<p>$(selector).action() (D)</p> Signup and view all the answers

Which function would you use to access or modify a CSS property of selected elements in jQuery?

<p>css() (D)</p> Signup and view all the answers

What does the val() function in jQuery allow you to do?

<p>Retrieve or modify the value of a form element. (A)</p> Signup and view all the answers

Flashcards

append()

Adds content to the end of the selected elements.

prepend()

Adds content to the beginning of the selected elements.

after()

Adds content after the selected elements.

before()

Adds content before the selected elements.

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remove()

Deletes the selected elements (with the possibility of filtering with CSS selectors).

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empty()

Deletes the child elements of the selected elements.

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$(document).ready()

Runs processing at the end of the page loading.

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$(element).event(function(){})

A method allowing you to run a function when a specific event occurs on an element.

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JavaScript Library

A collection of reusable code that helps simplify complex tasks and make code more efficient.

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JavaScript Framework

A structural framework that defines the overall architecture of an application. It provides a skeleton for building the application.

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jQuery

jQuery is a popular JavaScript library that simplifies complex tasks such as DOM manipulation and AJAX requests.

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DOM Manipulation with jQuery

jQuery makes it easier to access and manipulate elements in the HTML Document Object Model (DOM).

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Including jQuery in HTML

To use jQuery, include the jQuery library file in your HTML page.

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jQuery Basic Syntax

The basic syntax of jQuery involves selecting elements using a selector and then applying an action to them.

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jQuery Functions for DOM Access

jQuery provides functions for various actions like retrieving or modifying text content, HTML content, element values, data attributes, and more.

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jQuery for Attribute and Property Access

jQuery allows developers to retrieve or change the value of any attribute or property on a selected element.

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Study Notes

JavaScript Frameworks & Libraries

  • JavaScript is a widely used programming language for web development
  • Frameworks and libraries accelerate application development using JavaScript
  • Libraries are collections of class definitions and functions
  • Framework defines a skeletal structure for applications that applications can fill in
  • Libraries aim to easily reuse code without fundamentally changing the application's structure

jQuery

  • jQuery is a popular JavaScript library
  • It simplifies challenging aspects of JavaScript, such as DOM and AJAX
  • Used to manipulate HTML DOM, CSS, handle events, and AJAX calls
  • jQuery provides a basic syntax: $(selector).action()

jQuery Usage

  • To use jQuery, include the .js file as an external script in the HTML
  • Example: <script src="jquery-3.4.1.js"></script>

jQuery Syntax

  • $(selector).action(): used to select an element in the DOM and apply an action to it

jQuery DOM Access

  • text(): retrieves or modifies the textual content of selected elements.
  • html(): retrieves or modifies the HTML content of selected elements.
  • val(): retrieves or modifies the value of an element.
  • data(): retrieves or modifies the value of a data-* attribute.
  • attr(): retrieves or modifies the value of an attribute.
  • prop(): retrieves or modifies the value of a property.
  • css(): retrieves or modifies the value of a CSS property.

jQuery Events

  • jQuery adds additional event options beyond standard JavaScript events.
  • `.on("event", function(){}): Allows callback functions to be assigned to events.

jQuery Effects

  • jQuery provides functions to animate elements:
  • show(), hide(), fadeIn(), fadeOut(), fadeTo(), slideDown(), slideUp(), animate()

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JS Frameworks & Libraries - jQuery PDF

Description

This quiz explores the fundamentals of JavaScript frameworks and libraries, focusing specifically on jQuery. Test your knowledge about how jQuery simplifies web development tasks, including DOM manipulation and AJAX handling. Ideal for anyone looking to strengthen their understanding of client-side programming.

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