How to use $ character in sass file

Question

I have some sass files that contain the $ character. All files get errors when compiling. Because $ is reserved in sass. In the next example I want to select all css classes ending with 9. How to use $ Any idea .

[class$="9"]:after {
    background-color: #3d9970 !important;
}

Answer 1

Not sure what compiler you are using (dart or node) but you should be able to escape it using #{'$'}:

[class#{'$'}="9"]:after {
    background-color: #3d9970 !important;
}