.mybox {
  opacity: 0;
  opacity: 0.1;
  opacity: +0.1;
  opacity: 1.0;
  opacity: +1.0;
  opacity: -0.5; /* Noncompliant !{Update the invalid value of property "opacity". Expected format: <number>(0.0,1.0)}! */
  opacity: +1.5; /* Noncompliant */
  opacity: 1.5; /* Noncompliant */
  opacity: inherit;
}