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Questions and Answers
Which of the following statements best describes an event in JavaScript?
Which of the following statements best describes an event in JavaScript?
What does the 'onclick' event type specifically signify?
What does the 'onclick' event type specifically signify?
Which event is specifically related to form submission in JavaScript?
Which event is specifically related to form submission in JavaScript?
How many keyboard events are specifically mentioned for use in the context provided?
How many keyboard events are specifically mentioned for use in the context provided?
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Which statement is true regarding the use of events and JavaScript?
Which statement is true regarding the use of events and JavaScript?
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What is the purpose of using event handlers in JavaScript?
What is the purpose of using event handlers in JavaScript?
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Which of the following events cannot generate keyboard events?
Which of the following events cannot generate keyboard events?
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When does a 'resize' event occur in the context of JavaScript events?
When does a 'resize' event occur in the context of JavaScript events?
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What is the role of events in the Document Object Model (DOM)?
What is the role of events in the Document Object Model (DOM)?
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Which of the following correctly describes a mouse event?
Which of the following correctly describes a mouse event?
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Study Notes
JavaScript Events
- JavaScript interacts with HTML elements through events triggered by the user or browser actions.
- Events are integral to the Document Object Model (DOM) and each HTML element possesses a set of events capable of activating JavaScript code.
- Examples of events include page load, button clicks, key presses, window closure, and window resizing.
Event Types
- Page Load: This event happens when an entire webpage finishes loading.
- Click: This event occurs when a user clicks on an HTML element using the mouse.
- Key Press: This event is triggered whenever a key is pressed on the keyboard.
- Window Close: This event happens when the user closes a browser window.
- Window Resize: This event occurs when the user resizes the window or browser.
Event Attributes in HTML 4.01
- HTML 4.01 specification defines 19 attributes that can be used to trigger JavaScript code based on specific events.
- These attributes are designed to respond to user interactions, such as clicking, hovering, or submitting forms.
Level Events
- These attributes trigger JavaScript code based on events occurring at the document level, impacting the entire HTML page.
Form Level Events
- These six attributes execute JavaScript code based on events happening specifically within an HTML form.
Keyboard Events
- These events are activated by keyboard interactions, such as pressing a key, and are triggered by the user's keyboard actions.
- These events are not supported by these elements:
br,frame,frameset,head,html,iframe,meta,param,script,style, andtitle.
Mouse Events
- These events are triggered by mouse actions, such as hovering or clicking, in response to user interaction with HTML elements.
onclick Event
- This event is executed when the user clicks the left button of their mouse on an HTML element.
- It's commonly used for validation, warnings, or other interactive responses triggered by a user click.
onsubmit Event Type
- This event happens when a user attempts to submit an HTML form.
- It's often used for form validation to ensure data accuracy before submission to a server.
onsubmit Event Example
- The
onsubmitevent is triggered when a user tries to submit a form. - JavaScript functions can be called within the
onsubmitevent to perform validations. - If the validation function returns
true, the form is submitted; otherwise, the submission is prevented.
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Description
This quiz explores the fundamentals of JavaScript events and how they interact with HTML elements. Learn about various event types like page load, click, and key press that drive user interactions. Test your knowledge on event attributes defined in the HTML 4.01 specification.
