how do they use javascript

Question

help me

Answer 1

Who is "they" and what do you need help with.

Explain the problem. Describe the task. Show what you tried.

Answer 2

Surprisingly, JavaScript is used across web development– hence, it is used for both frontend and backend development. JavaScript is one of the favorite programming languages of developers as they look for an easy-to-use language to develop attractive internet applications. The best thing about JavaScript is that it can integrate with other programming languages such as CSS, HTML, etc.

https://datatas.com/where-javascript-is-used-in-real-life/