You can pass all css properties
applyStyles({
"myclass" : {
"color" : "rgb(254, 254, 254)",
"font-size": "12px"
},
"myotherclass" : {
"background-color" : "rgb(56, 60, 66)",
"border-color" : "rgba(0, 0, 0, 0.51)"
},
"myotherclass:hover" : {
"background-color" : "blue"
},
"myotherclass:active" : {
"background-color" : "red"
}
})
All tags with these classes (myclass & myotherclass) will be impacted.