CodeYourFuture · Temceo · Aug 7, 2026 · Aug 7, 2026 · Aug 7, 2026 · Aug 7, 2026
diff --git a/Sprint-3/todo-list/index.html b/Sprint-3/todo-list/index.html
@@ -1,24 +1,27 @@
 <!DOCTYPE html>
 <html lang="en">
+
 <head>
   <meta charset="UTF-8" />
-  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
   <title>ToDo List</title>
   <link rel="stylesheet" href="style.css" />
   <link href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css" rel="stylesheet">
 
   <script type="module" src="script.mjs"></script>
 </head>
+
 <body>
   <div class="todo-container">
     <h1>My ToDo List</h1>
 
     <div class="todo-input">
       <input type="text" id="new-task-input" placeholder="Enter a new task..." />
       <button id="add-task-btn">Add</button>
+      <button id="delete-completed-tasks-btn">Delete completed tasks</button>
     </div>
 
-    <ul id="todo-list" class="todo-list">      
+    <ul id="todo-list" class="todo-list">
     </ul>
 
     <!-- 
@@ -37,4 +40,5 @@ <h1>My ToDo List</h1>
 
   </div>
 </body>
-</html>
+
+</html>
diff --git a/Sprint-3/todo-list/script.mjs b/Sprint-3/todo-list/script.mjs
@@ -1,4 +1,4 @@
-// Store everything imported from './todos.mjs' module as properties of an object named Todos 
+// Store everything imported from './todos.mjs' module as properties of an object named Todos
 import * as Todos from "./todos.mjs";
 
 // To store the todo tasks
@@ -9,14 +9,13 @@ window.addEventListener("load", () => {
   document.getElementById("add-task-btn").addEventListener("click", addNewTodo);
 
   // Populate sample data
-  Todos.addTask(todos, "Wash the dishes", false); 
+  Todos.addTask(todos, "Wash the dishes", false);
   Todos.addTask(todos, "Do the shopping", true);
 
   render();
 });
 
-
-// A callback that reads the task description from an input field and 
+// A callback that reads the task description from an input field and
 // append a new task to the todo list.
 function addNewTodo() {
   const taskInput = document.getElementById("new-task-input");
@@ -45,12 +44,11 @@ function render() {
   });
 }
 
-
 // Note:
 // - First child of #todo-item-template is a <li> element.
 //   We will create each ToDo list item as a clone of this node.
 // - This variable is declared here to be close to the only function that uses it.
-const todoListItemTemplate = 
+const todoListItemTemplate =
   document.getElementById("todo-item-template").content.firstElementChild;
 
 // Create a <li> element for the given todo task
@@ -62,15 +60,24 @@ function createListItem(todo, index) {
     li.classList.add("completed");
   }
 
-  li.querySelector('.complete-btn').addEventListener("click", () => {
+  li.querySelector(".complete-btn").addEventListener("click", () => {
     Todos.toggleCompletedOnTask(todos, index);
     render();
   });
-    
-  li.querySelector('.delete-btn').addEventListener("click", () => {
+
+  li.querySelector(".delete-btn").addEventListener("click", () => {
     Todos.deleteTask(todos, index);
     render();
   });
-
   return li;
-}
+}
+
+// handling deletion of all completed todos
+const deleteCompletedButton = document.getElementById(
+  "delete-completed-tasks-btn"
+);
+
+deleteCompletedButton.addEventListener("click", (e) => {
+  Todos.deleteCompleted(todos);
+  render();
+});
diff --git a/Sprint-3/todo-list/todos.mjs b/Sprint-3/todo-list/todos.mjs
@@ -26,4 +26,11 @@ export function toggleCompletedOnTask(todos, taskIndex) {
   if (todos[taskIndex]) {
     todos[taskIndex].completed = !todos[taskIndex].completed;
   }
-}
+}
+
+// Delete all completed tasks if they exist
+export function deleteCompleted(todos) {
+  for (let index = todos.length - 1; index >= 0; index--) {
+    if (todos[index].completed === true) todos.splice(index, 1);
+  }
+}
diff --git a/Sprint-3/todo-list/todos.test.mjs b/Sprint-3/todo-list/todos.test.mjs
@@ -13,7 +13,7 @@ function createMockTodos() {
     { task: "Task 1 description", completed: true },
     { task: "Task 2 description", completed: false },
     { task: "Task 3 description", completed: true },
-    { task: "Task 4 description", completed: false },        
+    { task: "Task 4 description", completed: false },
   ];
 }
 
@@ -29,7 +29,6 @@ describe("addTask()", () => {
   });
 
   test("Should append a new task to the end of a ToDo list", () => {
-
     const todos = createMockTodos();
     const lengthBeforeAddition = todos.length;
     Todos.addTask(todos, theTask.task, theTask.completed);
@@ -42,7 +41,6 @@ describe("addTask()", () => {
 });
 
 describe("deleteTask()", () => {
-
   test("Delete the first task", () => {
     const todos = createMockTodos();
     const todosBeforeDeletion = createMockTodos();
@@ -53,7 +51,7 @@ describe("deleteTask()", () => {
 
     expect(todos[0]).toEqual(todosBeforeDeletion[1]);
     expect(todos[1]).toEqual(todosBeforeDeletion[2]);
-    expect(todos[2]).toEqual(todosBeforeDeletion[3]);        
+    expect(todos[2]).toEqual(todosBeforeDeletion[3]);
   });
 
   test("Delete the second task (a middle task)", () => {
@@ -66,7 +64,7 @@ describe("deleteTask()", () => {
 
     expect(todos[0]).toEqual(todosBeforeDeletion[0]);
     expect(todos[1]).toEqual(todosBeforeDeletion[2]);
-    expect(todos[2]).toEqual(todosBeforeDeletion[3]);        
+    expect(todos[2]).toEqual(todosBeforeDeletion[3]);
   });
 
   test("Delete the last task", () => {
@@ -79,7 +77,7 @@ describe("deleteTask()", () => {
 
     expect(todos[0]).toEqual(todosBeforeDeletion[0]);
     expect(todos[1]).toEqual(todosBeforeDeletion[1]);
-    expect(todos[2]).toEqual(todosBeforeDeletion[2]);        
+    expect(todos[2]).toEqual(todosBeforeDeletion[2]);
   });
 
   test("Delete a non-existing task", () => {
@@ -94,7 +92,6 @@ describe("deleteTask()", () => {
 });
 
 describe("toggleCompletedOnTask()", () => {
-
   test("Expect the 'completed' property to toggle on an existing task", () => {
     const todos = createMockTodos();
     const taskIndex = 1;
@@ -111,13 +108,12 @@ describe("toggleCompletedOnTask()", () => {
     const todos = createMockTodos();
     const todosBeforeToggle = createMockTodos();
     Todos.toggleCompletedOnTask(todos, 1);
-    
-    expect(todos[0]).toEqual(todosBeforeToggle[0]);    
+
+    expect(todos[0]).toEqual(todosBeforeToggle[0]);
     expect(todos[2]).toEqual(todosBeforeToggle[2]);
     expect(todos[3]).toEqual(todosBeforeToggle[3]);
   });
 
-
   test("Expect no change when toggling on a non-existing task", () => {
     const todos = createMockTodos();
     const todosBeforeToggle = createMockTodos();
@@ -130,3 +126,43 @@ describe("toggleCompletedOnTask()", () => {
   });
 });
 
+describe("deleteCompleted()", () => {
+  test("should delete all completed todos from todos array", () => {
+    const todos = createMockTodos();
+    const todosBeforeDeletion = createMockTodos();
+    const lengthBeforeDeletion = todos.length;
+    Todos.deleteCompleted(todos);
+
+    expect(todos).toHaveLength(2);
+
+    // expect the 1st todo to be the 2nd todo from the original task list
+    expect(todos[0]).toEqual(todosBeforeDeletion[1]);
+
+    // expect the 2nd todo to be the 4th todo from the original task list
+    expect(todos[1]).toEqual(todosBeforeDeletion[3]);
+  });
+
+  test("should delete all todos if all todos are completed", () => {
+    const todos = createMockTodos().map((task) => ({
+      ...task,
+      completed: true,
+    }));
+
+    const todosBeforeDeletion = createMockTodos();
+    Todos.deleteCompleted(todos);
+
+    expect(todos).toHaveLength(0);
+  });
+
+  test("should not delete todos if none are completed", () => {
+    const todos = createMockTodos().map((task) => ({
+      ...task,
+      completed: false,
+    }));
+
+    const todosBeforeDeletion = createMockTodos();
+    Todos.deleteCompleted(todos);
+
+    expect(todos).toHaveLength(todosBeforeDeletion.length);
+  });
+});