How to properly configure gulp-uncss?

Question

css

Hey everyone, I'm using gulp-uncss to remove unused properties in CSS.
Everything is fine, but only 2 classes are removed - visible and hidden , which are not in the html code, but they are in the js code.
How to be?

Answer 1

You can try like this, but to be honest, I did not check it myself:

.pipe(uncss({
    ignore: ['.visible', '.hidden']
}))

From the uncss documentation :
Options:
...
-i, --ignore Do not remove given selectors
...
And more from the documentation:

/* uncss:ignore */
.selector1 {
    /* this rule will be ignored */
}

.selector2 {
    /* this will NOT be ignored */
}

Answer 2

ignore option