JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <div class="outline outlineTop"></div>
    <div class="outline outlineRight"></div>
    <div class="outline outlineBottom"></div>
    <div class="outline outlineLeft"></div>
</div>

CSS

.container {
    width: 200px;
    height: 200px;
    margin: 50px;
    background-color: #EEE;
    position: absolute;
    zoom:200%;
    -webkit-zoom:200%;
}

.outline {
    position: absolute;
    background: #1899ef;
    z-index: 999999;
    opacity: 1 !important;
    zoom:50%;
    -webkit-zoom:50%;
}

.outlineBottom, .outlineTop {
  width: 100%;
  height: 1px;
  transform: scale(1,.5);
}

.outlineLeft, .outlineRight {
    height: 100%;
    width: 1px;
    transform: scale(.5,1);
}

.outlineRight {
    right: 0px;
}

.outlineBottom {
    bottom: 0px;
}