postcss-px-to-viewport/example/main.css

.class {
  margin: -10px .5vh;
  padding: 5vmin 9.5px 1px;
  border: 3px solid black;
  border-bottom-width: 1px;
  font-size: 14px;
  line-height: 20px;
}
.class2 {
  border: 1px solid black;
  margin-bottom: 1px;
  font-size: 20px;
  line-height: 30px;
}
@media (min-width: 750px) {
  .class3 {
    font-size: 16px;
    line-height: 22px;
  }
}

.class4-ignore::before {
  content: '';
  /* px-to-viewport-ignore-next */
  width: 10px;
  padding: 10px;
  height: 10px; /* px-to-viewport-ignore */
  border: solid 2px #000; /* px-to-viewport-ignore */
}
.class5-bad-ignore {
  /* px-to-viewport-ignore */
  width: 10px;
  /* px-to-viewport-ignore */
  height: 10px;
  /* px-to-viewport-ignore-next */
}

@keyframes move {
  0% {
    transform: translate(0, 0);
  }
  /* px-to-viewport-ignore-next */
  50% {
    transform: translate(10px, -10px);
  }
  100% {
    transform: translate(10px, -10px); /* px-to-viewport-ignore */
  }
}

/*
.class {
    font-size: 16px;
}
*/