HTML <colgroup> Tag

The <colgroup> tag is used to group columns in a <table> for formatting.

The <colgroup> tag is useful for applying styles to entire columns, instead of repeating the styles for each cell, for each row.

The <colgroup> tag can only be used inside a <table> element.

<colgroup>

Column group. Specifies attributes to be applied to a set of table columns. Often used with <col> elements.

• Option <colgroup> Attributes:
• span can be used to specify the number of columns the <colgroup> element applies to.
• align can be used to horizontally align the cells within the column group. The value can be left, center, right, justify or char.
• valign can be used to vertically align the cells within the column group. The value can be top, middle, bottom or baseline.
• char can be used to specify a character with which cells will align, such as a decimal point. It is not supported by any major browser.
• charoff can be used to specify the number of pixels the alignment should be offset from the char character. It is not supported by any major browser.

<colgroup>

The <colgroup> is a container for a number of <col> elements, and allows you to set attributes that you might otherwise set at col level on a number of <col> elements simultaneously—the attributes defined at this higher level apply to all of the child columns. It is important to note that if you use one or more <colgroup> then all <col>s must be enclosed in one or more <colgroup>s.