A Step-by-Step Guide to Creating an Interactive Todo List Application
Introduction: This is a list of tasks for a beginner to think about how to build the todo application. A link to detailed post with code is at the bottom. Make sure to look into it if only necessary.
Section 1: Setting Up the Project:Get ready to start coding by setting up the project environment:
- Create an empty directory for your project.
- Inside the directory, create an HTML file named "index.html."
- Add the basic HTML structure with
- Include a CSS file named "styles.css" within the
<head>section for styling.
- Link your CSS file to the HTML using the
- Open the HTML file in a browser to ensure everything is set up correctly.
Section 2: Creating the User Interface:Build the user interface elements for the todo app:
- Inside the
<body>section, create a
<div>element with the class "container" to hold the app.
- Inside the container, add an
<input>element with the ID "taskInput" for entering tasks.
- Create a
<button>element with the ID "addTaskBtn" labeled "Add Task."
- Under the button, create an empty
<ul>element with the ID "taskList" to display tasks.
Section 3: Adding Tasks Dynamically:Learn to add tasks to the list using DOM manipulation:
- In "app.js," select the input field using the
- Similarly, select the "Add Task" button using its ID.
- Use the
addEventListenermethod to capture the click event on the button.
- Inside the event listener, retrieve the task input value using the
- Create a new
<li>element, set its inner text to the task, and append it to the
Section 4: Checking off Tasks:Implement the functionality to mark tasks as completed:
- For each new
<li>element, add a
<input>checkbox before the task text.
- Assign a unique ID to each checkbox and label it as "taskCheckbox."
- Add an event listener to each checkbox to listen for the "change" event.
- Inside the event listener, toggle the class "completed" on the associated
- Use CSS to style completed tasks differently, e.g., by changing the text color.
Section 5: Deleting Tasks:Allow users to remove tasks from the list:
- Beside each task, add a "Delete" button within a
- Set a class name "deleteBtn" to the button for identification.
- Attach a click event listener to each delete button using
- Inside the event listener, use the
removeChildmethod to delete the associated
Section 6: Local Storage Integration:Ensure task persistence even after page refresh:
- Inside the event listener for adding tasks, after appending the
<li>, save tasks to
- Use the
localStorage.setItemmethod to save tasks as a JSON string.
- On page load, retrieve tasks from
- Parse the JSON string back into an array of tasks and display them on the page.
Section 7: Styling and Final Touches:Add a touch of style to the app:
- Open "styles.css" and add basic styles to format the container, input, and button.
- Style the tasks with proper margins, padding, and alignment.
- Apply CSS transitions to create smooth animations for task completion and deletion.
Section 8: Conclusion and Next Steps:Celebrate your achievement and consider what's next:
- Recap the journey and completed todo app.
- Look into frameworks like React or Vue for advanced projects.
Complete coding guide of todo app here