It is used to define the set of rows that make up the header of a table.
It has no attributes other than global ones, so to define presentation aspects, CSS properties such as background-color, text-align or vertical-align will be used.
Must appear after <caption> and <colgroup> elements, but before any <tbody>, <tfoot>, or <tr> element.
Browsers can use <thead>, <tbody> and <tfoot> to allow scrolling of the body of the table independently of the header and footer. Similarly, when doing CSS for printing and if the table is spread across multiple pages, these elements can allow both the header and footer to appear repeated at the beginning and end of each printed page.
<thead>, <tbody>, and <tfoot> together also serve to provide useful semantic information used when rendering for screen or printer, as well as to improve accessibility.
Has an implicit ARIA role rowgroup.
- Type: table-header-group
- Self-closing: No
- Semantic value: No
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