ref: 54ecade02fc2c86914b7ba2d3998eb3aff9a2f77
dir: /docs/themes/gohugoioTheme/src/css/_anchorforid.css/
.header-link:after {
position: relative;
left: 0.5em;
opacity: 0;
font-size: 0.8em;
-moz-transition: opacity 0.2s ease-in-out 0.1s;
-ms-transition: opacity 0.2s ease-in-out 0.1s;
}
h2:hover .header-link,
h3:hover .header-link,
h4:hover .header-link,
h5:hover .header-link,
h6:hover .header-link {
opacity: 1;
}