colgroup ... ⁄colgroup
HTML5 colgroup element
The colgroup element allows you to group one or more columns in a table. »video
The number of columns to be grouped in that colgroup can be specified through span attribute or by using the element:
span="1" → 1 column
→ 1 column
Warning: use either either span at a time (if both used, span is ignored).
About colgroup
- is an optional element »examples
- multiple colgroup elements allowed per HTML5 document, in the same table or in multiple table elements
Display & support colgroup
- display in browser »video
Parents, children colgroup
- colgroup nested within elements »colgroup parents
- elements nested within colgroup »colgroup children
»examples
»video
The colgroup element is the second optional element inside table element (table's second child).
Attributes colgroup
- required: none
- optional: specific attributes, global attributes, event attributes
Syntax colgroup
| 1 2 3 4 | <> ... <⁄> <> ... ... <⁄> ... » video |
Attributes and Values colgroup (comma separated)
| < | attribute | = | "attribute_value(s)" | > | Video | Examples |
|---|---|---|---|---|---|---|
| 1. specific attributes | ||||||
| 1. | span | = | integer | »video | < span="2"> ... <⁄> | |
| All Specific Attributes | ||||||
| 2. global attributes | ||||||
| 1. | accesskey | = | keyboard key | »img | < accesskey="h"> ... </> | |
| 2. | class | = | class name | »html »img | < class="class_name"> ... </> | |
| 3. | contenteditable | = | "", , true, false | »html | < contenteditable="true"> ... </> | |
| 4. | contextmenu | = | menu id value | »html | < contextmenu="menu_id_value"> ... </> | |
| 5. | data-* | = | value | - | < data-http-error="404"> ... </> | |
| 6. | dir | = | ltr, rtl, auto | »html | < dir="ltr"> ... </> | |
| 7. | draggable | = | true, , false | »img | < draggable="false"> ... </> | |
| 8. | dropzone | = | copy, move, link, string:, file: | - | < dropzone="copy"> ... </> | |
| 9. | hidden | = | "", , hidden | »html »img | < hidden="hidden"> ... </> | |
| 10. | id | = | id name | »html »img | < id="unique_id_name"> ... </> | |
| 11. | itemid | = | URL | - | - | |
| 12. | itemprop | = | string | »link »a | - | |
| 13. | itemref | = | string | - | - | |
| 14. | itemscope | = | "", , itemscope | - | - | |
| 15. | itemtype | = | absolute URL | - | - | |
| 16. | lang | = | language code | »html »head»title »img | < lang="en"> ... </> | |
| 17. | spellcheck | = | "", , true, false | »html | < spellcheck="true"> ... </> | |
| 18. | style | = | CSS property:value | »html »img | < style="color:red"> ... </> | |
| 19. | tabindex | = | integer | »img | < tabindex="3"> ... </> | |
| 20. | title | = | text | »html »link»style »abbr»dfn »img »meter | < title="html page"> ... </> | |
| 21. | translate | = | "", yes, no | »html »img | < translate="yes"> ... </> | |
| All Global Attributes | ||||||
| 3. global event attributes | ||||||
| 1. | onclick | = | script | » list | <element onclick="script" > ... | |
| 2. | ondblclick | = | script | » list | <element ondblclick="script" > ... | |
| All Event Attributes | ||||||
Video demonstration colgroup element
HTML5 colgroup element: group columns in a table
| min | video details |
|---|---|
| 00:04 | video tutorial: colgroup tag, grouping columns in a tabel |
| 00:04 | colgroup element allows you to group one or more columns in a group inside a table |
| 00:13 | adding colgroup element in page, inside table element |
| 00:20 | the number of columns to be grouped inside the colgroup element can be specified through col element |
| 00:24 | our table has 4 columns which can be grouped inside colgroup (colgroup = a column group) |
| 00:30 | let's group the first 2 columns in a first group |
| 00:34 | group = literally adding the col tag inside colgroup; 1 col = 1 colun; 2 col = 2 columns ... |
| 00:39 | and the next 2 columns in another group (a 2nd colgroup) |
| 00:49 | the 4 columns were grouped as follows |
| 00:57 | let's make visible the 2 groups of columns through CSS by adding a 6px border to each; by default the colgroup elements are not visible in browser |
| 01:02 | thus we have: 2 columns <col><col> grouped in the first colgroup & 2 columns <col><col> grouped in the second colgroup |
| 01:08 | we can group 3 columns in the first colgroup and 1 in the second |
| 01:19 | you can specify a unique style for each column <col>, BUT in case the same style applies to multiple columns, a group of columns, you can span those columns like this: |
For more information about the element, please see the specs: W3C ⁄ WHATWG