This Assignment Will Assess Your Implementation Of Ja 871924

This assignment will assess your implementation of JavaScript and and a JS framework

This assignment will assess your implementation of JavaScript and a JS framework (jQuery). In particular, you should concentrate on using AJAX to fetch data from files and web services in JSON formats. You will create a webpage that dynamically adjusts its content based on user selections. The page contains a form with two select inputs, 'animal' and 'display', which send their values via AJAX to a PHP script (animals.php). Based on the response, the page updates to show a photo, general statistics, continent population statistics, or all combined, with consistent banners and images. You are required to write the JavaScript in animals.js to handle form submission, AJAX requests, DOM manipulation, and dynamic styling. The page structure and initial files, including example.html, style.css, and images, are provided. You must prevent default form submission, use jQuery AJAX methods, update page sections based on JSON responses, and control element visibility and styles. The output should match the specified behavior precisely, including showing/hiding sections, updating images, banners, and graphs, and applying CSS widths for the continent data. The code must be well-documented, modular, and avoid redundancy. Only submit animals.js and index.html, with all JavaScript functionality implemented in animals.js.

Paper For Above instruction

The development of dynamic web pages enhances user experience by providing real-time content updates without requiring page refreshes. This project exemplifies such advancements by utilizing JavaScript, jQuery, AJAX, and JSON data formats to create an interactive webpage that displays information about various animals. The core function revolves around a form that allows users to select an animal and a display option, which then triggers AJAX calls to a server-side PHP script to retrieve relevant data. This data is subsequently used to update different sections of the page dynamically, demonstrating mastery in client-server communication, DOM manipulation, styling, and event handling.

The webpage design involves three main display options: Photo, General Statistics, and Continent Population Statistics, along with an option to combine all of these (All of the Above). Each section has specific content requirements that must be dynamically loaded based on the JSON data received from the server. For example, selecting "Photo" should display an image of the chosen animal along with the banner, while "General Statistics" provides specific facts about the animal, such as Latin name, lifespan, height, and weight. The "Continent Population Statistics" displays a colored bar graph representing the distribution percentages across continents, where the widths of individual bars are controlled with CSS dynamically manipulated via jQuery.

To implement this, the JavaScript code must first intercept the form submission event, prevent default behavior, and collect form data using jQuery’s serialization methods. An AJAX POST request is then sent to animals.php, passing the form data. The server responds with a JSON array containing the appropriate data structure based on the selected animal and display option. The JavaScript code then parses this JSON, and depending on the "type" field (error, photo, general, continent, or all), updates the webpage accordingly.

Updating the DOM involves changing inner HTML content or attributes, such as image sources, text within spans, or styles of divs representing continents. For section visibility, jQuery's show() and hide() functions are used to ensure only relevant sections are displayed at a time. When updating the continent bars, the script sets their widths dynamically with the css() method to reflect the percentages obtained from the server data. The banner background image is applied by setting the background-image CSS property on the banner div, using the filename provided in the JSON response.

Code organization emphasizes modularity and readability. Event handlers are clearly defined, and AJAX success callbacks encapsulate the DOM updates. Error handling involves displaying messages within a designated error paragraph element when invalid selections are made, such as when a "-" is chosen in either select input. The overall design ensures that interactions are smooth, responsive, and accurately reflect the data fetched from the server, demonstrating competence in asynchronous programming, DOM management, and CSS manipulation with jQuery.

References

  • Duckett, J. (2014). JavaScript and jQuery: The Missing Manual. O'Reilly Media.
  • Gała, M. (2019). AJAX and JSON Tutorial. W3Schools. https://www.w3schools.com/xml/ajax_intro.asp
  • MDN Web Docs. (2023). Using Fetch. Mozilla. https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch
  • W3Schools. (2023). jQuery AJAX Methods. https://www.w3schools.com/jquery/jquery_dom_ajax.asp
  • Svanes, J. (2016). DOM manipulation with JavaScript. JavaScript.info. https://javascript.info/modifying-document
  • O’Reilly Media. (2018). Web Development with JavaScript and jQuery. O'Reilly
  • Pettit, L. (2017). Mastering jQuery. SitePoint.
  • Crockford, D. (2008). JavaScript: The Good Parts. O'Reilly Media.
  • Stack Overflow Community. (2023). AJAX Requests and DOM Updates. https://stackoverflow.com/questions/tagged/ajax
  • Chaffer, H. (2020). Dynamic CSS manipulation with jQuery. CSS-Tricks. https://css-tricks.com/

Related Assignments