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jQuery Basics and Event Handling
19 Questions
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jQuery Basics and Event Handling

Created by
@LuminousGadolinium

Questions and Answers

Which jQuery method is used to attach multiple event handlers to an element?

  • multiple()
  • on() (correct)
  • click()
  • attach()

    • Which jQuery method returns the direct parent element of the selected element?

  • ancestors()
  • ancestor()
  • parent() (correct)
  • parents()

    • Look at the following selector: $(':disabled'). What does it select?

  • All hidden elements (correct)
  • All elements containing the text 'disabled' (correct)
  • All elements that do not contain the text 'disabled' (correct)
  • All disabled input elements (correct)

    • Which jQuery method is used to remove selected elements?

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

    Look at the following selector: $('p#intro'). What does it select?

    <p>The p element with id='intro'</p> Signup and view all the answers

    Look at the following selector: $('div p'). What does it select?

    <p>All p elements inside a div element</p> Signup and view all the answers

    Which jQuery method is used to switch between adding/removing one or more classes (for CSS) from selected elements?

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

    Which jQuery method should be used to deal with name conflicts?

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

    What is the correct jQuery code for making all div elements 100 pixels high?

    <p>$('div').height(100)</p> Signup and view all the answers

    Which jQuery method is used to set one or more style properties for selected elements?

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

    Which jQuery method is used to hide selected elements?

    <p>visible(false)</p> Signup and view all the answers

    Which jQuery method is used to perform an asynchronous HTTP request?

    <p>jQuery.ajaxAsync()</p> Signup and view all the answers

    JQuery uses CSS selectors to select elements?

    <p>True</p> Signup and view all the answers

    Which statement is true?

    <p>To use jQuery, you can refer to a hosted jQuery library at Google</p> Signup and view all the answers

    With jQuery, look at the following selector: $('div.intro'). What does it select?

    <p>The first div element with class='intro'</p> Signup and view all the answers

    When using jQuery, what is used to determine when the web page's DOM has been fully loaded by the browser?

    <p>$(document).ready()</p> Signup and view all the answers

    Select the jQuery code that will set the background color of all li elements to green.

    <p>$('li').css('background-color', 'green');</p> Signup and view all the answers

    With jQuery, look at the following selector: $('div.intro'). What does it select?

    <p>All div elements with class='intro'</p> Signup and view all the answers

    Look at the following selector: $('p#intro'). What does it select?

    <p>The p element with id='intro'</p> Signup and view all the answers

    Study Notes

    jQuery Event Handlers

    • Use on() to attach multiple event handlers to an element.

    jQuery Parent Elements

    • parent() returns the direct parent element of the selected element.

    jQuery Selectors

    • The selector :disabled selects all disabled input elements.
    • The selector $("p#intro") selects the p element with id="intro".
    • The selector $("div p") selects all p elements inside any div element.

    jQuery Element Removal

    • Both detach() and remove() can be used to remove selected elements.

    jQuery Class Management

    • Use toggleClass() to switch between adding and removing one or more classes from selected elements.

    jQuery Conflict Resolution

    • Use noConflict() to deal with name conflicts in the jQuery library.

    jQuery Element Styling

    • The code $("div").height(100) sets all div elements to a height of 100 pixels.
    • Use css() to set one or more style properties for selected elements.
    • Use hide() to hide selected elements.

    jQuery AJAX Requests

    • The method jQuery.ajax() is used to perform asynchronous HTTP requests.

    jQuery and CSS Selectors

    • jQuery uses CSS selectors to select elements, making it simple to manipulate DOM elements based on their properties.

    jQuery Library Usage

    • To use jQuery, refer to a hosted jQuery library at Google; it is not built into most browsers by default.

    jQuery DOM Ready

    • Use $(document).ready() to determine when the web page's DOM has fully loaded.

    jQuery Element Selection by Class

    • The selector $("div.intro") selects all div elements with class="intro".
    • The selector $('div.intro') refers to the first div element with class='intro'.

    jQuery Element Background Color

    • To set the background color of all li elements to green, use $('li').css('background-color', 'green').

    jQuery General Knowledge

    • jQuery is an open-source JavaScript library designed for easy HTML document traversal and manipulation, event handling, and asynchronous communication.

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    Quiz Team

    Description

    Test your knowledge of jQuery fundamentals, including event handlers, parent element manipulation, and selection techniques. This quiz covers essential methods like on(), parent(), and various selectors to help reinforce your understanding of jQuery. Dive in and see how well you know jQuery!

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