.wrap {
  background: $red;
}

.sample {
  width: 100%;
  display: block;
  height: 24px;
  background: green;
}

.slider {
  background: blue;
  height: 20px;
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  box-sizing: border-box;
}