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Questions and Answers
What can JavaScript enable web designers to do?
Where can JavaScript be placed in a web page?
What does the type attribute in the opening tag of
In what way can JavaScript react to events?
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What is a requirement for JavaScript to work in a browser?
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What file extension is used for external JavaScript documents?
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Which object represents the whole document in the Document Object Model (DOM)?
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What does the statement document.links.href retrieve in the DOM?
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What method can be used to ensure that users have entered appropriate values in a form control using JavaScript?
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How can you write JavaScript to run as the page loads?
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Study Notes
- JavaScript is a programming language used in web development to manipulate HTML and add functionality to websites
- JavaScript enables web designers to make interactive elements like pop-ups, respond to user events, and perform calculations
- JavaScript scripts can be added to HTML documents within the
<script>
tag. Browsers must support JavaScript and have it enabled - Scripts can be added at the beginning or end of the HTML document, or in an external .js file using the
src
attribute - Comments in JavaScript are used to add notes to the code, with the
//
symbol to indicate the start of a comment - Document Object Model (DOM) is a set of rules that defines the structure of a webpage. It allows JavaScript to access and manipulate various elements in the Document
- JavaScript can access user-entered form data through the DOM and perform validation
- DOM provides a way to access and manipulate different parts of a webpage, such as links, images, and form data.
- Browsers that do not support JavaScript will display alternative content defined in the HTML document.
- The DOM is used to make the content of forms and links available for use in the script, allowing for dynamic form validation and navigation.
- JavaScript allows the creation of user interfaces, form validation, and content loading without requiring a complete page reload.
- JavaScript can interact with other technologies like CSS and XML, allowing for complex web applications.
- JavaScript can be used for creating interactive maps, animations, and games.
- JavaScript frameworks like React, Angular, and Vue.js provide additional functionality and structure for building web applications.
- JavaScript libraries like jQuery and Bootstrap provide pre-written code to simplify common web development tasks.
- JavaScript can be used for server-side programming with technologies like Node.js and Express.js.
- JavaScript provides cross-platform compatibility, allowing for the creation of web applications that can be accessed on various devices and browsers.
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Description
Test your knowledge of the reasons to use JavaScript in web development and its capabilities such as interacting with HTML elements, creating pop-up windows, performing calculations, and reacting to user events.