feat(curriculum): add favourite icon toggler lab (#55885)

Co-authored-by: Jessica Wilkins <67210629+jdwilkin4@users.noreply.github.com>
Co-authored-by: Tom <20648924+moT01@users.noreply.github.com>

client/i18n/locales/english/intro.json

@@ -2212,7 +2212,12 @@
       },
       "esfh": { "title": "188", "intro": [] },
       "gibb": { "title": "189", "intro": [] },
-      "whrm": { "title": "190", "intro": [] },
+      "lab-favorite-icon-toggler": {
+        "title": "Build a Favorite Icon Toggler",
+        "intro": [
+          "In this lab, you will build a favorite icon toggler by utilizing JavaScript click events."
+        ]
+      },
       "fhxc": { "title": "191", "intro": [] },
       "quiz-dom-manipulation-and-click-event-with-javascript": {
         "title": "DOM Manipulation and Click Events with JavaScript Quiz",

client/src/pages/learn/front-end-development/lab-favorite-icon-toggler/index.md

@@ -0,0 +1,9 @@
+---
+title: Introduction to the Build a Favorite Icon Toggler
+block: lab-favorite-icon-toggler
+superBlock: front-end-development
+---
+
+## Introduction to the Build a Favorite Icon Toggler
+
+In this lab, you will build a favorite icon toggler by utilizing JavaScript click events.

curriculum/challenges/_meta/lab-favorite-icon-toggler/meta.json

@@ -0,0 +1,11 @@
+{
+  "name": "Build a Favorite Icon Toggler",
+  "isUpcomingChange": true,
+  "usesMultifileEditor": true,
+  "blockType": "lab",
+  "dashedName": "lab-favorite-icon-toggler",
+  "order": 190,
+  "superBlock": "front-end-development",
+  "challengeOrder": [{ "id": "66bf6bacf178eac7b96d4f5e", "title": "Build a Favorite Icon Toggler" }],
+  "helpCategory": "JavaScript"
+}

curriculum/challenges/english/25-front-end-development/lab-favorite-icon-toggler/66bf6bacf178eac7b96d4f5e.md

@@ -0,0 +1,216 @@
+---
+id: 66bf6bacf178eac7b96d4f5e
+title: Build a Favorite Icon Toggler
+challengeType: 14
+dashedName: build-a-favorite-icon-toggler
+demoType: onClick
+---
+
+# --description--
+
+In this lab you will use JavaScript click events to toggle the appearance of a favorite icon. When the heart icon is clicked, the appearance of the heart changes from empty to filled, and vice versa.
+
+**Objective:** Fulfill the user stories below and get all the tests to pass to complete the lab. **Do not copy this demo project**.
+
+**User Stories:**
+
+1. You should have an unordered list with three items.
+2. The unordered list should have the class `item-list`.
+3. The three list items should contain the item name followed by a `span` element with the class `favorite-icon`.
+4. The `span` element should contain the code `♡` initially to represent an empty heart.
+5. When a span element containing a heart is clicked, you should add the `filled` class to the clicked `span` if it's not already present, and remove it, if it is.
+6. When a `span` element containing a heart is clicked, the heart symbol should toggle between `♡` (empty heart) and `❤` (filled heart), depending on its current state.
+
+# --hints--
+
+You should have an unordered list.
+
+```js
+assert.exists(document.querySelector('ul'));
+```
+
+Your unordered list should have 3 items.
+
+```js
+assert.lengthOf(document.querySelectorAll('ul li'), 3);
+```
+
+Your unordered list should have the class `item-list`.
+
+```js
+assert.exists(document.querySelector('ul.item-list'));
+```
+
+Your individual list items should contain the item name.
+
+```js
+assert.exists(document.querySelector('ul li').textContent);
+
+```
+
+Your individual list item should contain a  `span` element with the class `favorite-icon` 
+
+```js
+assert.exists(document.querySelector('ul li span.favorite-icon'));
+```
+
+Initially, the `span` elements should contain the code `♡` to represent an empty heart.
+
+```js
+const inputs = document.querySelectorAll('ul li span.favorite-icon');
+assert(inputs.length)
+
+for (let input of inputs) {
+    assert.strictEqual(input.innerHTML.charCodeAt(0), 9825);
+}
+```
+
+When the `span` element is clicked, and it contains the class `filled`, you should remove the class `filled` from the `span` element and change the innerHTML of the `span` element to `♡`.
+
+```js
+const spanElements = document.querySelectorAll('.favorite-icon');
+assert(spanElements.length);
+
+spanElements.forEach(span => span.classList.add('filled'));
+
+spanElements.forEach(span => {
+    span.dispatchEvent(new Event('click'));
+    span.dispatchEvent(new Event('change'));
+    assert.isFalse(span.classList.contains('filled'));
+    assert.equal(span.innerHTML.charCodeAt(0), 9825);
+});
+```
+
+When the `span` element is clicked, and it doesn't contain the class `filled`, you should add the class `filled` to the `span` element and change the `innerHTML` of the `span` element to `❤`.
+
+```js
+const spanElements = document.querySelectorAll('.favorite-icon');
+assert(spanElements.length);
+
+spanElements.forEach(span => span.classList.remove('filled'));
+
+spanElements.forEach(span => {
+    span.dispatchEvent(new Event('click'));
+    span.dispatchEvent(new Event('change'));
+    assert.isTrue(span.classList.contains('filled'));
+    assert.equal(span.innerHTML.charCodeAt(0), 10084);
+});
+```
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="utf-8">
+    <title></title>
+    <link rel="stylesheet" href="styles.css">
+</head>
+
+<body>
+
+</body>
+
+</html>
+```
+
+```css
+
+```
+
+```js
+
+```
+
+# --solutions--
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Favorite Icon Toggle</title>
+    <link rel="stylesheet" href="styles.css">
+</head>
+
+<body>
+    <h1>Art Supplies</h1>
+    <ul class="item-list">
+        <li>
+            120 gm paper
+            <span class="favorite-icon" id="favoriteIcon1">&#9825;</span>
+        </li>
+        <li>
+            Watercolor set
+            <span class="favorite-icon" id="favoriteIcon2">&#9825;</span>
+        </li>
+        <li>
+            Lead pencil 6B
+            <span class="favorite-icon" id="favoriteIcon3">&#9825;</span>
+        </li>
+    </ul>
+
+    <script src="script.js"></script>
+</body>
+
+</html>
+```
+
+```css
+body {
+    display: flex;
+    flex-direction: column;
+    justify-content: center;
+    align-items: center;
+    height: 100vh;
+    margin: 0;
+    font-family: Arial, sans-serif;
+}
+
+h1 {
+    margin-bottom: 20px;
+}
+
+.item-list {
+    list-style-type: none;
+    padding: 0;
+}
+
+.item-list li {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 10px;
+    border-bottom: 1px solid #ddd;
+    width: 200px;
+}
+
+.favorite-icon {
+    font-size: 20px;
+    cursor: pointer;
+}
+```
+
+```js
+document.addEventListener("DOMContentLoaded", () => {
+  const favoriteIcons = document.querySelectorAll(".favorite-icon");
+
+  favoriteIcons.forEach((icon) => {
+    icon.addEventListener("click", () => {
+      if (icon.classList.contains("filled")) {
+        icon.classList.remove("filled");
+        icon.innerHTML = "&#9825;"; // Empty heart
+      } else {
+        icon.classList.add("filled");
+        icon.innerHTML = "&#10084;"; // Filled black heart
+      }
+    });
+  });
+});
+```