It's a very rare use case, but wanted to create a PR to find out if it's worthwhile making it to sass-loader too.

Why?

• I used the sassOptions.data key to inject some dynamic Sass variables
• node-sass itself allows data to be passed in sassOptions

But...

sass-loader overwrites sassOptions.data which means I can't do the variable injection any more.

Solution

Check if sassOptions.data is present first, and if yes, then prepend that before file content. Otherwise, just roll with the file content as normal.