div[resize] {
    position: absolute;
    display: block;
}
div[resize]:hover {
    background-color: rgba(0, 0, 0, 0.1);
}
div[resize='left'] {
    cursor: e-resize;
    width: 4px;
    left: 0px;
    top: 0;
    height: 100%;
}

div[resize='right'] {
    cursor: e-resize;
    width: 4px;
    right: 0px;
    top: 0;
    height: 100%;
}

div[resize='top'] {
    cursor: s-resize;
    height: 4px;
    width: 100%;
    top: 0px;
    left: 0;
    touch-action: auto;
}

div[resize='bottom'] {
    cursor: s-resize;
    height: 4px;
    width: 100%;
    bottom: 0px;
    left: 0;
}