JavaScript is an object-oriented programming language that is often used in web development to add dynamic effects and interactivity to web pages. It is widely used in websites, desktop applications, server-side programming, and mobile application development. JavaScript files play an important role in web programming. The importance and use of JavaScript files will be analyzed in detail below.

First of all, in web development, JavaScript files are script files used to add dynamic functions and interactivity to web pages. Through JavaScript code, complex operations on web pages and functions that are highly dependent on user interaction can be realized, such as form validation, menu dynamic effects, image rotation, editable content, etc. JavaScript files can separate HTML pages and CSS files from scripts, making the structure of the web page clearer and the code easier to maintain and modify. Refer to the following code example:

    
  
Welcome to my webpage
 
Please enter your name:
  Submit   

In the above code, we referenced thescript.jsfile through the