SASS - extend 

style.scss


.messageDesign{
  padding: 10px;
  width: 150px;
  text-align: center;
  color: #444;
}

.error{
  border: 1px solid red;
  @extend .messageDesign;
}
.warning{
  border: 1px solid yellow;
  @extend .messageDesign;
}
.success{
  border:1px solid green;
  @extend .messageDesign;
}




or make a placeholder(%) messageDesign




WE USE PLACEHOLDER IF YOU DO NOT NEED TO HAVE ARGUMENT LIKE;


messageDesign(param1,param2)




%messageDesign{
  padding: 10px;
  width: 150px;
  text-align: center;
  color: #444;
}

.error{
  border: 1px solid red;
  @extend %messageDesign;
}
.warning{
  border: 1px solid yellow;
  @extend %messageDesign;
}
.success{
  border:1px solid green;
  @extend %messageDesign;
}

































































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