Use of Tbody,thead,tfoot

These tags seem to be less commonly used, but they have a big effect at some point.

When we have a large table that needs to be shown, we will need them. Because table is displayed when the entire table is downloaded, if the page table content is more, it takes a lot of time to download, so it is easy for users to lose interest in browsing. So we're going to use the label above to "improve the page display".

Tbody,thead,tfoot are all sub-tags of table, apparently they are "table body", "Table Header", "Footer". Their display order is from beginning to end, thead before Tbody,tbody before TFOOT, which requires us to set these tags, thead before tbody appear, tbody before tfoot appear, a table inside allow multiple tbody. These tags can be a large table block display, that is, first display a piece, and then display the following block, where the block is in the table "row" units, that is, the Tbody label is the subordinate label TR, so that the browser can see a part of the complete information. Although the time to display a full page is the same, it is more user-friendly.