Check out example codes for "css no overflow". It will help you in understanding the concepts better.

Code Example 1

div.ex1 {
  overflow: scroll;
}

div.ex2 {
  overflow: hidden;
}

div.ex3 {
  overflow: auto;
}

div.ex4 {
  overflow: visible;
}

Code Example 2

div {
  width: 200px;
  height: 
50px;
  background-color: #eee;
  
overflow: visible;
}

Learn ReactJs, React Native from akashmittal.com