Chapter 2: Introduction to JavaScript

16 tasks and 1 summary  

We’ll learn a little about JavaScript, use it to change the page layout, write a theme switcher, create an interactive subscription form, and learn how to use the console.

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1. Why is JavaScript necessary? Task
2. Introduction to the theme switcher Task
3. Find an element using querySelector Task
4. Output the element to the console. Task
5. Let’s remove the class using classList.remove Task
6. Let’s add a class to the element using classList.add Task
7. Declare a variable Task
8. Introduction to the event handler Task
9. Let’s make it so that the theme is switched when the button is clicked Task
10. Introduction to classList.toggle Task
11. Let’s finish our theme switcher Task
12. Introduction to the textContent property Task
13. Change the textual content for the element Task
14. Uncomment the code Task
15. We retrieve data from the input field using input.value Task
16. Let’s use concatenation Task
17. Summary of “Introduction to JavaScript” Summary