table header fixed on scroll code example

Example 1: table fixed header

.tableFixHead thead th { position: sticky; top: 0; }

Example 2: html table scrollable body fixed header

/*Simply*/  position:sticky; top: 0; /*your th elements*/

Example 3: table fixed header

.tableFixHead          { overflow: auto; height: 100px; }
.tableFixHead thead th { position: sticky; top: 0; z-index: 1; }

/* Just common table stuff. Really. */
table  { border-collapse: collapse; width: 100%; }
th, td { padding: 8px 16px; }
th     { background:#eee; }