jsGrid - what is the best way to style grid?

I am trying to style JSGrid (js-grid.com). At first I tried to override style rules in css file, but this method is not good. It's not flexible.

For example checkbox. I have default checkbox, but for example I want to style it like material design icons (mdi).

On initial loading, I want checkbox looks like mdi. In documentation there is a rowRenderer(item, itemIndex) method, but inside this method I get my record object only

{
    "provider": "Jon Doe",
    "service": "UPS",
    "name": "Jon Doe Name",
    "region": "Region 1",
    "schedule": "1 Day",
    "cet": "23:59",
    "dwo": "09:00",
    "dwc": "23:59",
    "disabled": false
}

My last field "disabled" - checkbox and I want to style it. But inside method I know only that it could be true/false, how to render a label before it, or set some class?

Here is my fields config:

fields: [

   {
       name: "disabled",
       type: "checkbox",
       title: "Disabled",
       editing: true,
       visible: true
   },
]