Need help understanding AJAX and JSON // The following comments are settings for various linters…

Need help understanding AJAX and JSON

// The following comments are settings for various linters
// Not sure if a reported error matters? Look it up at http://linterrors.com/js
/*global console: false, window: false, document: false*/

/*jslint es5: true */
/*jslint node: false*/
/*jslint browser: true*/
/*jslint devel: true*/
/*jslint plusplus: true */

/*jshint es5: true */
/*jshint globalstrict: true*/
/*jshint jquery: true*/
/*jshint node: false*/
/*jshint browser: true*/
/*jshint devel: true*/

/*eslint-env jquery */
/*eslint-env browser*/
/*eslint no-console: 0*/

/* The AJAX and JSON.pdf file is an example of what a finished version of this project should look like. */

(function () {
“use strict”;
// The DOM is now loaded and can be manipulated
var DEBUG = true;
var $form = $(document.forms.requestImagesForm);
if (DEBUG) {
console.log(“$form”, $form);
}

// TODO: In the requestImages function, make an AJAX request for JSONP data
// and append the item descriptions (which include images) into the #images
// HTML element.
// See the example called “Loads the four most recent pictures of Mount
// Rainier from the Flickr JSONP API.”
// at: https://api.jquery.com/jQuery.getJSON/
// but get the tags from the #searchTags form HTML element.
// Make sure you use jQuery’s .done and .fail AJAX methods.
//
// Inside .done you must replace all content inside the #images HTML element
// so it doesn’t have content from other AJAX requests in it.
// Also inside .done use this line of code to get an item’s description
// (this is required in the rubric):
// $images.append($(“

“).append(item.description));
// Display all the items, unlike the example which only loads 4 items from
// Flickr.
//
// Inside .fail at least use console.log to let the user know that a failure occurred
// (which can happen if your wi-fi is turned off).
var requestImages = function () {
// TODO: Write your code after this line in this requestImages function

};

if ($form) {
// TODO: Bind the submit event to a function that prevents
// the default action
// and then calls the requestImages function.
$form.on(“”, function (event) {
if (DEBUG) {
console.log(“Handler for $form.submit() called.”);
}
// TODO: Prevent the default behavior of the form submit event, by
// using the event parameter
if (event) {

}
// TODO: Call the requestImages function

// TODO: return false (the old way of preventing the default
// behavior of the form submit event)

});

// Make the initial AJAX request as the page loads
requestImages();
}

/* From https://graphicdon.com/2020/07/01/a-complete-guide-to-dark-mode-on-the-web/ */
var btn = document.querySelector(“.btn-toggle”);
var prefersDarkScheme = window.matchMedia(“(prefers-color-scheme: dark)”);

var currentTheme = localStorage.getItem(“theme”);
if (currentTheme === “dark”) {
document.body.classList.toggle(“dark-theme”);
} else if (currentTheme === “light”) {
document.body.classList.toggle(“light-theme”);
}

btn.addEventListener(“click”, function (event) {
if (DEBUG) {
console.log(“btn click event:”, event);
}
var theme = “dark”;
if (prefersDarkScheme.matches) {
document.body.classList.toggle(“light-theme”);
theme = document.body.classList.contains(“light-theme”) ?
“light” :
“dark”;
} else {
document.body.classList.toggle(“dark-theme”);
theme = document.body.classList.contains(“dark-theme”) ?
“dark” :
“light”;
}
localStorage.setItem(“theme”, theme);
});
})(); // See: https://developer.mozilla.org/en-US/docs/Glossary/IIFE

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