what are the .map files used for in Bootstrap 3.x?

There are two files included in the CSS folder with .map file extensions. They are: bootstrap-theme.css.map bootstrap.css.map They appear to be minified files but I don’t know what they are for. 8 s 8 From Working with CSS preprocessors in Chrome DevTools: Many developers generate CSS style sheets using a CSS preprocessor, such as Sass, … Read more