sinevik

#a:hover + #b {
  display: block;
}

.ivan {
  animation: ivan 3s infinite;
}

:indeterminate { background: limegreen; }

:indeterminate + span { background: limegreen; }

var count = 10;

let timerId = setInterval(function(){
    count += 10;
    console.log(count);
    if (count >= 100) {
        clearInterval(timerId)
    }
}, 2000);

if (this.state.NotesArr !== null) {

    return (
        <div style={this.state.books}>
            asdadasdasd
        </div>
    )

} 

return (
   <div>
      sdfsdfsdfsdf
   </div>
)