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

.class {
  margin: -3.125vw .5vh;
  padding: 5vmin 2.96875vw 1px;
  border: 0.9375vw solid black;
  border-bottom-width: 1px;
  font-size: 4.375vw;
  line-height: 6.25vw;
}
.class2 {
  border: 1px solid black;
  margin-bottom: 1px;
  font-size: 6.25vw;
  line-height: 9.375vw;
}
@media (min-width: 750px) {
  .class3 {
    font-size: 16px;
    line-height: 22px;
  }
}

.class4-ignore::before {
  content: '';
  width: 10px;
  padding: 3.125vw;
  height: 10px;
  border: solid 2px #000;
}
.class5-bad-ignore {
  /* px-to-viewport-ignore */
  width: 3.125vw;
  /* px-to-viewport-ignore */
  height: 3.125vw;
  /* 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;
}
*/