Add prefixes to CSS class names using LESS or SASS

Question

I am trying to use Bootstrap on a project that encompasses 400+ sites and uses the previous CSS class names (which I have no control over). I've been running into some CSS name clashing and the solution for me is to add a prefix to Bootstrap (.row to .tb-row for example).

I am familiar with the method of adding a namespace using LESS, where an additional class is wrapped around the classes. Unfortunately, this doesn't look like it will solve my issues.

Is there a method via LESS, SASS, or any other compiler that makes it easy for me to add a tb- prefix to all existing classes in Bootstrap?

Answer 1

You could probably do this with SASS

• $namespace: "tb";
• ⌘ + f (or similar) to find all the classes in your CSS file. You're going to probably need a regex (and some trial+error) to find them all.
• add .#{$namespace}- to all the classes.

Ideally, you'd get get something like this:

$namespace: "tb";

.#{$namespace}-myClass {
  background:pink !important;
}

.#{$namespace}-carousel-module {
  width: 25%;
}

compiled to

.tb-myClass {
  background:pink !important;
}

.tb-carousel-module {
  width: 25%;
}

"Easy" might be a stretch but "easier" seems fitting.

I'm not sure if this is the best approach, in honesty, I'm just ripping off a gist that I saw with comments from people a lot smarter than I am. May come in handy for you though!

Answer 2

You would need to modify the bootstrap code directly, an example of how this could be achieved elegantly in less:

.prefixname {
    &-row { 
        ...
    }  
}