This code creates a simple web page that allows users to convert between different units of data storage, such as bytes, kilobytes, megabytes, gigabytes, and terabytes. Users enter a value to convert, select the unit to convert from and to, and then click the "Convert" button. The JavaScript code then performs the necessary calculations and displays the result on the page.
The CSS styling ensures that the web page is responsive and adapts to different screen sizes. The max-width property limits the width of the page to 600 pixels, and the width property of various elements is set to 100% to ensure they fill the available space.
The JavaScript code uses the switch statement to determine the conversion factors between different units of data storage, and then applies them to the input value to obtain the result. The toFixed() method is used to round the result to two decimal places before displaying it on the page.