Week 14
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Questions and Answers

Which item in jQuery allows you to select and manipulate HTML elements?

  • jQuery Selectors (correct)
  • DOM Manipulation
  • CSS Manipulation
  • jQuery Events

Which of the following statements about jQuery Selectors is false?

  • All jQuery selectors start with a dollar sign and parentheses.
  • jQuery selectors do not have any custom selectors. (correct)
  • The syntax of jQuery is adaptable to the performing action.
  • jQuery Selectors can find elements by their name.

What is the purpose of the dollar sign (") in jQuery syntax?

  • To select elements based on classes only.
  • To determine the type of event performed.
  • To define or access jQuery. (correct)
  • To find and hide HTML elements.

What is the correct syntax to hide an element with the id 'test'?

<p>$('#test').hide() (D)</p> Signup and view all the answers

Which syntax correctly selects all

elements?

<p>$('p').hide() (D)</p> Signup and view all the answers

What syntax can be used to select all

  • elements of every
      ?

    • <p>$('ul li') (A)</p> Signup and view all the answers

    How can you select all elements that are even?

    <p>$('tr:even') (C)</p> Signup and view all the answers

    Which syntax selects elements with an href attribute?

    <p>$('[href]') (D)</p> Signup and view all the answers

    How can you select all \ elements of type="button"?

    <p>$(':button') (B)</p> Signup and view all the answers

    How can you select all \ elements with a target attribute value equal to "_blank"?

    <p>$('a[target=&quot;_blank&quot;]') (C)</p> Signup and view all the answers

    What describes the different visitor's actions that a web page can respond to?

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

    What is the basic syntax of jQuery events?

    <p>$('p').click() (A)</p> Signup and view all the answers

    Mouse events, keyboard events, form events, and document/window events are examples of what?

    <p>jQuery DOM events (C)</p> Signup and view all the answers

    Which method is used to attach event handlers to elements in jQuery DOM events?

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

    What method takes two functions and combines mouseenter() and mouseleave()?

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

    What method is executed when the form field loses focus?

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

    Which syntax correctly selects all elements with a target attribute value not equal to '_blank'?

    <p>$('a[target!=&quot;_blank&quot;]') (B), $('a[target!=_blank]') (C), $('a[target!=&quot;_blank&quot;]') (D)</p> Signup and view all the answers

    The 'dblclick' event is synonymous with the 'doubleclick' event in jQuery.

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

    What jQuery method can be used to attach an event handler to elements?

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

    The event that occurs when an input field gains focus is called _____ .

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

    Match the jQuery events with their respective actions:

    <p>mouseenter = Triggered when the mouse enters an element mouseleave = Triggered when the mouse leaves an element click = Triggered when an element is clicked blur = Triggered when an element loses focus</p> Signup and view all the answers

    Which of the following is a jQuery event used for handling submission of forms?

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

    Mouse events and keyboard events are types of jQuery DOM events.

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

    What does the method 'hover()' combine in jQuery?

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

    Which jQuery selector syntax will hide all

    elements?

    <p>$('p').hide() (B)</p> Signup and view all the answers

    All jQuery selectors begin with a dollar sign and parentheses.

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

    What jQuery syntax will select the first

  • of every
      ?

    • <p>$('ul li:first')</p> Signup and view all the answers

    The jQuery method used to hide an element is called __________.

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

    Which of these can be used to select all elements with the class 'intro'?

    <p>$('.intro') (A)</p> Signup and view all the answers

    Match the following syntax with their function:

    <p>$('p.first') = Selects the first <p> element $('ul li:last') = Selects the last <li> of any <ul> $('tr:odd') = Selects all odd <tr> elements $('*[href]') = Selects all elements with an href attribute</p> Signup and view all the answers

    The statement '$(this).hide()' hides all elements on the page.

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

    What is the jQuery selector for even elements?

    <p>$('tr:even')</p> Signup and view all the answers

    Flashcards

    jQuery Selectors

    Part of jQuery used to find and manipulate HTML elements.

    jQuery basic syntax

    The standard way of working with jQuery elements ( $,(selector),jQuery action())

    $ in jQuery

    Starts the jQuery command.

    Hiding element with ID "test"

    Using jQuery to hide the element with id 'test'.

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    Hiding elements with class "test"

    jQuery command to hide elements with class 'test'.

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    Hiding current element

    jQuery method to hide the currently selected HTML element.

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    Selecting all elements

    jQuery command to select all HTML elements.

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    Selecting elements with class "intro"

    jQuery method to select elements with class 'intro'.

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    jQuery button selector

    Selecting all button elements using jQuery

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    jQuery target attribute selector (not _blank)

    jQuery target attribute selector (= _blank)

    jQuery Events

    Represent visitor actions on a webpage, marking specific moments of action.

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    jQuery event syntax

    A simplified format for attaching and handling specific page actions in jQuery

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    jQuery DOM events

    Events related to elements on the web page

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    jQuery mouse events

    Handle mouse-related actions

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    jQuery event on()

    Method attaching event handlers to elements

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    Selecting First Child

    A jQuery selector that targets the first child element within another element. For example, 'ul li:first-child' selects the first list item within a unordered list.

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    Selecting Even Elements

    A jQuery selector that targets all elements with even indexes (0, 2, 4, etc.). Useful for alternating row colors in tables or similar effects.

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    jQuery Attribute Selector

    A selector used to find elements based on their attributes and values. For instance, '[href]' selects all elements with an href attribute.

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    Hiding a Specific Element

    A jQuery action that makes a specified element invisible on the web page. For example, $('#myElement').hide();

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    Selecting Elements with a Class

    A jQuery selector that targets elements with a specific class attribute. For example, '.myClass' selects all elements assigned to the class 'myClass'.

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    jQuery on() Method

    A versatile method to attach event handlers to elements, making them reactive to user actions.

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    jQuery hover() Method

    A combination of mouseenter() and mouseleave() methods, triggering actions when the mouse enters or leaves an element.

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    jQuery blur() Method

    Triggers when a form field loses focus, meaning the cursor moves away.

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    Study Notes

    jQuery Selectors

    • One of the most crucial parts of the jQuery library
    • Used to select and manipulate HTML elements
    • Allows for finding specific HTML elements

    jQuery Selectors: False Statement

    • jQuery Selectors allow finding elements by name, ID, class, attribute types, and attribute values.
    • jQuery Selectors are based on existing CSS selectors and offer custom selectors.
    • jQuery selector syntax typically has a dollar sign and parentheses.
    • jQuery syntax is not always static, but adaptable for element actions.

    jQuery Basic Syntax

    • Basic syntax includes the dollar sign '$'
    • The use of parentheses alongside a selector.
    • The 'jQuery action' is a component of the syntax.
    • The '&' symbol is not part of jQuery's basic syntax.

    jQuery '$' in Syntax

    • The '$' symbol is used to define or access jQuery
    • It is used to query HTML elements.
    • Used to specify actions to be performed on those elements
    • Used to find HTML elements

    Hiding Elements using jQuery

    • $("#test").hide() hides an element with the ID "test."
    • $(".test").hide() hides all elements with the class "test."
    • $(this).hide() hides the currently selected HTML element.
    • $("p").hide() hides all <p> elements.

    jQuery Selectors: All Elements

    • $("*") selects all elements.

    jQuery Selectors: Specific Elements

    • $("p.intro") selects all <p> elements with the class "intro."
    • $("ul li:first") selects the first <li> element within each <ul> element.
    • $("ul li:first-child") selects the first <li> of the first <ul>.
    • $("p:first") selects the first <p> element.
    • $("tr:even") selects all even numbered <tr> elements

    jQuery Attributes

    • $("[href]") selects elements with an href attribute.

    jQuery Events

    • jQuery is used to handle events on HTML elements.

    jQuery Events: Basic Syntax

    • $("p").click() is the basic syntax for jQuery events.

    jQuery Mouse Events, Keyboard Events, and Form Events

    • Mouse, keyboard, form, and document/window events are jQuery capabilities.

    jQuery DOM Events

    • click(), dblclick(), mouseenter(), mouseleave(), mousedown(), and mouseup() related events are part of the jQuery DOM events.

    • Events like mousecatch() and mousetrap() fall outside of standard jQuery DOM events.

    Attaching Event Handlers in jQuery

    • jQuery's on() method is used to attach event handlers to elements.

    jQuery Mouse Interaction Method

    • hover() handles both mouseenter and mouseleave events for an element.

    jQuery Method for Form Field Focus Loss

    • The blur() method in jQuery is activated when a field loses focus.

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    Related Documents

    JS WK 14 jQuery Practice Questions PDF

    Description

    Test your knowledge on jQuery selectors and basic syntax. This quiz covers the functionality and rules associated with selecting and manipulating HTML elements using jQuery. Dive in to see how well you understand these critical concepts!

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