JavaScript with jQuery Overview
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Questions and Answers

What does the hide() method do in jQuery?

  • Hides the selected elements (correct)
  • Shows the selected elements
  • Toggles selected elements
  • Fades out the selected elements

    • The toggle() method shows and hides selected elements randomly.

    False

    What is the purpose of the fadeIn() method in jQuery?

    Fades in the selected elements

    The method used to fade out selected elements is called ______.

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

    Match the jQuery methods with their descriptions:

    <p>hide() = Hides the selected elements show() = Shows the selected elements fadeToggle() = Toggles between fadeIn() and fadeOut() toggle() = Toggles between hide() and show()</p> Signup and view all the answers

    Which jQuery method can be used to animate to a specific opacity level?

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

    The method fadeToggle() can only be used with paragraphs.

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

    What is the result when the show() method is called?

    <p>It makes the selected elements visible.</p> Signup and view all the answers

    Which jQuery method is used to hide an element by sliding it up?

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

    The slideToggle() method in jQuery is used to hide an element only.

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

    What event is triggered when the element with ID 'flip' is clicked?

    <p>A slide action (down, up, or toggle) is triggered on the '#panel' element.</p> Signup and view all the answers

    The jQuery method used to display an hidden element is called ______.

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

    Match the jQuery method to its function:

    <p>slideUp() = Hides an element by sliding it up slideDown() = Reveals an element by sliding it down slideToggle() = Toggles the visibility of an element with sliding motion fadeOut() = Gradually hides an element by fading it out</p> Signup and view all the answers

    What CSS property is used to set the padding for the panel and flip elements?

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

    The #panel is set to be visible by default in the provided code.

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

    What is the default display state of the #panel element?

    <p>none</p> Signup and view all the answers

    What method is used to set the background color of all matched elements in jQuery?

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

    The jQuery fadeOut() method can be used to make an element visible.

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

    What is the purpose of the jQuery attr() method?

    <p>To set or return attributes and values of the selected elements.</p> Signup and view all the answers

    The jQuery method used to hide HTML elements is called __________.

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

    Match the following jQuery methods with their functionalities:

    <p>css() = Get or set CSS properties text() = Set or return text content html() = Set or return HTML content animate() = Create custom animations</p> Signup and view all the answers

    What does the jQuery after() method do?

    <p>Inserts content after the selected elements</p> Signup and view all the answers

    The jQuery remove() method only removes the selected elements but keeps their child elements.

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

    The jQuery __ method adds one or more class names to selected elements.

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

    Which jQuery method is used to manipulate the style properties of elements?

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

    The toggleClass() method can only add classes to an element, not remove them.

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

    What is the primary function of the jQuery before() method?

    <p>It inserts content before the selected HTML elements.</p> Signup and view all the answers

    The fadeOut() method can only be called with the default speed setting.

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

    Name one jQuery method that can be used to hide elements.

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

    The method _______ combines the effects of fadeIn and fadeOut.

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

    Which jQuery method is used to show selected elements by sliding them down?

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

    The slideToggle() method can only be used with elements that are already visible.

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

    What is the effect of the slideUp() method?

    <p>The slideUp() method hides the selected elements by sliding them upwards.</p> Signup and view all the answers

    What does the jQuery method text() do when used to set content?

    <p>Sets the plain text content of an element</p> Signup and view all the answers

    The jQuery method html() can be used to retrieve the inner HTML of an element.

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

    What is the result of using the val() method on an input field?

    <p>It retrieves or sets the value attribute of the input field.</p> Signup and view all the answers

    To change the HTML content of a paragraph, you would use the ________ method.

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

    What happens when you click the button associated with the text() method?

    <p>The paragraph's text is changed to 'Hello world!'</p> Signup and view all the answers

    The alert() function can display both plain text and HTML content.

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

    The function $(document).ready(function() {...}) ensures the code runs when the ________ is loaded.

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

    How do you retrieve the background color of a

    element using jQuery?

    <p>Use $('p').css('background-color')</p> Signup and view all the answers

    What is the effect of the following jQuery code: $('p').css('background-color', 'yellow');?

    <p>It sets the background color of all <p> elements to yellow.</p> Signup and view all the answers

    What does the jQuery fadeTo() method do?

    <p>Fades selected elements to a specified opacity level</p> Signup and view all the answers

    Which jQuery method is used to manipulate CSS properties of selected elements?

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

    Which jQuery method would you use to toggle the visibility of elements?

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

    Which of the following describes the fadeOut() method?

    <p>It makes elements gradually disappear.</p> Signup and view all the answers

    Which statement accurately describes the jQuery method .animate()?

    <p>It combines multiple CSS property animations into one.</p> Signup and view all the answers

    When using the show() method, what happens to the hidden elements?

    <p>They become visible immediately.</p> Signup and view all the answers

    What is the effect of the jQuery fadeToggle() method?

    <p>Fades elements in and out based on their current state.</p> Signup and view all the answers

    In jQuery, what is likely the result of using the hide(1000) method?

    <p>The element will fade out over a 1-second duration.</p> Signup and view all the answers

    What feature does the fadeIn() method provide in jQuery?

    <p>Gradually makes selected elements visible.</p> Signup and view all the answers

    What will be the result of clicking a button that has a jQuery event listener for the toggle() method?

    <p>Hidden paragraphs will be displayed, while shown ones will be hidden.</p> Signup and view all the answers

    What is the primary function of the jQuery slideUp() method?

    <p>To hide an element by sliding it up</p> Signup and view all the answers

    Which method would you use to both show and hide an element on click?

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

    What visual effect is produced by the slideDown() method?

    <p>An element slides down into view</p> Signup and view all the answers

    What CSS property is modified to give the #panel a padding of 50px?

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

    What jQuery function ensures that the DOM is fully loaded before executing the code inside it?

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

    Which method is invoked when the element with ID 'flip' is clicked?

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

    What does the CSS rule display: none; accomplish for the #panel element?

    <p>It completely hides the element from view</p> Signup and view all the answers

    In the context of the example, what will happen when the #flip element is clicked if the panel is visible?

    <p>The panel will slide up and become hidden</p> Signup and view all the answers

    What does the jQuery addClass() method do?

    <p>Adds class attributes to selected elements</p> Signup and view all the answers

    What will happen when the jQuery removeClass() method is executed on selected elements?

    <p>It removes the specified class from the elements</p> Signup and view all the answers

    Which method is used to toggle a class in jQuery?

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

    In which scenario would you use the jQuery css() method?

    <p>To change the style properties of selected elements</p> Signup and view all the answers

    What happens to the class 'blue' when the removeClass() method is applied?

    <p>It removes only the class 'blue' from selected elements</p> Signup and view all the answers

    What function does the toggleClass() method serve in jQuery?

    <p>It adds a specified class only if it does not exist, otherwise it removes it</p> Signup and view all the answers

    When using jQuery, what will occur when clicking the button linked to the toggleClass('blue') function?

    <p>The blue class will be toggled on and off for the selected elements</p> Signup and view all the answers

    Which of the following is a correct outcome of using the css() method in jQuery?

    <p>It can set or return multiple style properties</p> Signup and view all the answers

    What does the text() method do when setting content for a paragraph element?

    <p>Replaces the text content of the paragraph with specified text.</p> Signup and view all the answers

    Which jQuery method is used to retrieve the inner HTML of a paragraph element?

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

    What will be the output of the val() method when used without any parameters?

    <p>Retrieves the current value of the selected input field.</p> Signup and view all the answers

    When the html() method is used to set content, what happens to the previous content of the selected element?

    <p>The previous content is replaced with new content.</p> Signup and view all the answers

    What trigger occurs when a button associated with the text() method is clicked?

    <p>The text of the paragraph is updated to a predetermined string.</p> Signup and view all the answers

    In jQuery, what does the val() method do when setting a value?

    <p>Changes the value of the input field to a static string.</p> Signup and view all the answers

    Which method would you use to manipulate the HTML content of an element?

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

    Which statement is true regarding the $(document).ready() function?

    <p>It ensures that the jQuery code runs only when the DOM is fully loaded.</p> Signup and view all the answers

    What does the jQuery attr() method do when used to set an attribute?

    <p>It modifies an existing attribute to a new value.</p> Signup and view all the answers

    Which jQuery method is used to insert content at the beginning of selected elements?

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

    What is the purpose of the jQuery remove() method?

    <p>It removes the selected elements and their associated events.</p> Signup and view all the answers

    When using the jQuery empty() method, what is the outcome?

    <p>It sets the content of the selected elements to an empty string.</p> Signup and view all the answers

    Which of the following methods would you use to add content after a selected element?

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

    What happens when you call the jQuery attr() method on an image element with the width attribute set?

    <p>It retrieves the current width value of the image.</p> Signup and view all the answers

    To insert content before a selected element in jQuery, which method is appropriate?

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

    Study Notes

    JavaScript with jQuery

    • This presentation covers JavaScript and jQuery examples.
    • The course is at Yeungjin University.
    • The content focuses on jQuery Effect Methods and jQuery HTML&CSS Methods.
    • Learning objectives include explaining and using jQuery Effect and HTML&CSS methods.

    jQuery Effect Methods

    • Hide and Show Methods:

      • hide(): Hides selected elements.
      • show(): Displays selected elements.
      • toggle(): Alternates between hiding and showing selected elements.
      • Included are examples of using the hide(), show(), and toggle() methods and demonstrating the speed parameter. Examples are included.

    • Fade Methods:

      • fadeIn(): Gradually shows elements.
      • fadeOut(): Gradually hides elements.
      • fadeTo(): Fades elements to a specified opacity.
      • fadeToggle(): Alternates between fadeIn() and fadeOut().
      • Shows how to fade elements in with different speed parameters, demonstrating different parameters. Includes specific examples with code.

    • Slide Methods:

      • slideDown(): Slides elements down.
      • slideUp(): Slides elements up.
      • slideToggle(): Alternates between sliding up and down.
      • Demonstrates slideDown(), slideUp(), and slideToggle() with examples, including code showing how to use these features.

    jQuery Animate and Stop Method

    • animate(): Used for custom animations on selected elements, animating multiple properties. Examples show how to use multiple properties together.
    • stop(): Stops currently running animations on selected elements. Examples are included and show how to stop animations.

    jQuery HTML&CSS Methods

    • Get and Set Content and Attributes:

      • text(): Sets or returns text content.
      • html(): Sets or returns content including HTML.
      • val(): Sets or returns input field values.
      • attr(): Sets or returns attributes.
      • Include examples for how to use each method; returning or setting text, content, or attributes.

    • Add and Remove Elements:

      • append(): Adds content to the end of selected elements.
      • prepend(): Adds content to the beginning of selected elements.
      • after(): Adds content after selected elements.
      • before(): Adds content before selected elements.
      • remove(): Removes the selected elements.
      • empty(): Removes content from selected elements.
      • Provides examples of how to add and remove elements including detailed content, using these specific jQuery methods.

    • Get and Set CSS Classes:

      • addClass(): Adds class(es) to selected elements.
      • removeClass(): Removes class(es) from selected elements.
      • toggleClass(): Toggles a class on/off for selected elements.
      • css(): Sets or returns CSS styles. Provides specific examples of usage for each method
      • Show how to add, remove, toggle CSS classes and return or modify style elements with css() method.

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    JavaScript jQuery Examples (Week 14, Lesson 2) PDF

    Description

    This quiz covers essential jQuery Effect Methods along with HTML and CSS techniques using jQuery. It focuses on practical examples like hide, show, and fade methods, enabling students to understand these functionalities in JavaScript development. Aimed at Yeungjin University students, it will enhance your jQuery skills.

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