纯CSS样式的表头固定

table {
width: 100%;
border-collapse: collapse;
}

th,
td {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: left;
}

thead th {
  position: sticky;
  top: 0;
  background-color: white;
}

#table-container {
  height: 800px;
  overflow-y: auto;
}