<tr>
====

**HTML `<tr>` 元素**定义表格中的行。同一行可同时出现`<td>` (en-US) 和`<th>` 元素。

|  |  |
| --- | --- |
| Content categories (en-US) | None |
| Permitted content | Zero or more `<td>` (en-US) or `<th>` elements, or a mix of them |
| Tag omission | Start tag is mandatory. End tag may be omitted if the `<tr>` element is immediately followed by a `<tr>` element, or if the parent table group (`<thead>`, `<tbody>` or `<tfoot>`) element doesn't have any more content |
| Permitted parents | `<table>`, `<thead>`, `<tbody>` or `<tfoot>` element |
| Permitted ARIA roles | Any |
| DOM interface | `HTMLTableRowElement` (en-US) |

Attributes
----------

表格标签支持 全局特性 (en-US)。还有一些过期的特性，你应该避免使用它们，但是可以了解它们，会在你阅读旧代码的时候有所帮助。

`align` 
已弃用

该枚举属性指定每个单元格中内容的水平对齐方式，可使用的属性值如下：

* `left`, 内容在单元格中左对齐
* `center`, 内容在单元格中居中
* `right`, 内容在单元格中右对齐
* `justify`, 增加文本内容之间的空白以伸展这行文本，使得该单元格中的多行文本具有相同的长度。
* `char`, aligning the textual content on a special character with a minimal offset, defined by the `char` and `charoff` attributes 未实现 (查看 Firefox bug 2212)If this attribute is not set, the parent node's value is inherited.

**备注：** Do not use this attribute as it is obsolete (not supported) in the latest standard.

* To achieve the same effect as the `left`, `center`, `right` or `justify` values, use the CSS `text-align` property on it.
* To achieve the same effect as the `char` value, in CSS3, you can use the value of the `char` as the value of the `text-align` property 未实现.

`bgcolor` 
已弃用

This attribute defines the background color of each cell of the row. It can be either an hexadecimal `#RRGGBB` or `#RGB` value or a color keyword.

**备注：** the `<tr>` element should be styled using CSS. To give a similar effect to the **bgcolor** attribute, use the CSS property `background-color`.

`char` 
已弃用

This attribute is used to set the character to align the cells in a column on. Typical values for this include a period (.) when attempting to align numbers or monetary values. If `align` is not set to `char`, this attribute is ignored.

**备注：** Do not use this attribute as it is obsolete (and not supported) in the latest standard. To achieve the same effect as the `char`, in CSS3, you can use the character set using the `char` attribute as the value of the `text-align` property 未实现.

`charoff` 
已弃用

This attribute is used to indicate the number of characters to offset the column data from the alignment characters specified by the **char** attribute.

**备注：** Do not use this attribute as it is obsolete (and not supported) in the latest standard.

`valign` 
已弃用

This attribute specifies the vertical alignment of the text within each row of cells of the table header. Possible values for this attribute are:

* `baseline`, which will put the text as close to the bottom of the cell as it is possible, but align it on the baseline of the characters instead of the bottom of them. If characters are all of the size, this has the same effect as `bottom`.
* `bottom`, which will put the text as close to the bottom of the cell as it is possible;
* `middle`, which will center the text in the cell;
* and `top`, which will put the text as close to the top of the cell as it is possible.

**备注：** Do not use this attribute as it is obsolete (and not supported) in the latest standard: instead set the CSS `vertical-align` property on it.

Examples
--------

See `<table>` for examples on `<tr>`.

Specifications
--------------

| Specification |
| --- |
| HTML Standard # the-tr-element |

Browser compatibility
---------------------

BCD tables only load in the browser with JavaScript enabled. Enable JavaScript to view data.

See also
--------

* Other table-related HTML Elements: `<caption>`, `<col>`, `<colgroup>`, `<table>`, `<tbody>`, `<td>` (en-US), `<tfoot>`, `<th>`, `<thead>`;
* CSS properties and pseudo-classes that may be specially useful to style the `<tr>` element:
    + the `:nth-child` pseudo-class to set the alignment on the cells of the column;
    + the `text-align` property to align all cells content on the same character, like '.'.<