Sometimes when writing CSS, you will need to insert CSS code that Flux doesn't understand, usually to trick browsers like Internet Explorer into doing something correctly.
Flux allows you to mark your code so that it won't get modified by Flux, allowing you to insert invalid, or "unusual" CSS.
Simply wrap the code you want to retain in special comments, like in the example below.
/*FLUX_IGNORE_START*/
.fixed:after{content:"."; display:block; height:0; clear:both; visibility:hidden;}
.fixed{display:block;}
/* \*/
.fixed{min-height:1%;}
* html .fixed{height:1%;}
/*FLUX_IGNORE_END*/
When these special comments are used, you will not be able to modify these CSS visually rules in Flux, but you can still edit them in the Code Editor.
Another solution to this problem is to use a separate CSS file that only contains your special rules. If you don't modify these rules, Flux won't make any changes.
Note : This is not required if you use FreeCode on all the pages that access the .css file.