Html what does tr mean

If align is not set to char , this attribute is ignored. Note: This attribute is not only obsolete, but was rarely implemented anyway. To achieve the same effect as the char attribute, set the CSS text-align property to the same string you would specify for the char property, such as text-align: ".

A DOMString indicating the number of characters on the tail end of the column's data should be displayed after the alignment character specified by the char attribute.

For example, when displaying money values for currencies that use hundredths of a unit such as the dollar, which is divided into cents , you would typically specify a value of 2, so that in tandem with char being set to ". A DOMString specifying the vertical alignment of the text within each cell in the row.

Possible values for this attribute are:. Aligns each cell's content text as closely as possible to the bottom of the cell, handling alignment of different fonts and font sizes by aligning the characters along the baseline of the font s used in the row. If all of the characters in the row are the same size, the effect is the same as bottom. Draws the text in each of the row's cells as closely as possible to the bottom edge of those cells. Note: Don't use the obsolete valign attribute.

Instead, add the CSS vertical-align property to the row. This simple example shows a table listing people's names along with various information about membership in a club or service. This HTML demonstrates the most basic structure of a table. There are no groups, no cells that span multiple rows or columns, no captions, and only the most basic styling to create lines around the components of the table for something resembling clarity. There are just four rows including one header row , each with four columns including one header column.

Not even the table section elements are used; instead, the browser is allowed to determine this automatically. That way, both header and data cells are easily demarcated. Now, let's introduce another column that shows the date the user's membership ended, along with a super-heading above the "joined" and "canceled" dates called "Membership Dates".

This involves adding both row and column spans to the table, so that the heading cells can wind up in the right places. Notice how the heading area here is actually two rows, one with "Name", "ID", "Membership Dates", and "Balance" headings, and the other with "Joined" and "Canceled", which are sub-headings below "Membership Dates". This is accomplished by:. The HTML is similar to the previous example's, except for the addition of the new column in each data row, and the changes to the header.

Those changes make the HTML look like this:. The differences that matter here—for the purposes of discussing row and column spans—are in the first few lines of the code above.

The order of precedence from highest to lowest for the attribute valign as well as the other inherited attributes lang , dir , and style is the following:. Furthermore, when rendering cells, horizontal alignment is determined by columns in preference to rows, while for vertical alignment, rows are given preference over columns.

The default alignment for cells depends on the user agent. However, user agents should substitute the default attribute for the current directionality i. User agents that do not support the "justify" value of the align attribute should use the value of the inherited directionality in its place.

These two attributes control spacing between and within cells. The following illustration explains how they relate:. In the following example, the cellspacing attribute specifies that cells should be separated from each other and from the table frame by twenty pixels. If a table or given column has a fixed width, cellspacing and cellpadding may demand more space than assigned.

User agents may give these attributes precedence over the width attribute when a conflict occurs, but are not required to. Non-visual user agents such as speech synthesizers and Braille-based devices may use the following TD and TH element attributes to render table cells more intuitively:.

In the following example, we assign header information to cells by setting the headers attribute. Each cell in the same column refers to the same header cell via the id attribute. Note how the header "Type of Coffee" is abbreviated to "Type" using the abbr attribute. Here is the same example substituting the scope attribute for the headers attribute. Note the value "col" for the scope attribute, meaning "all cells in the current column":.

Here's a somewhat more complex example illustrating other values for the scope attribute:. Note the use of the scope attribute with the "row" value. Although the first cell in each row contains data, not header information, the scope attribute makes the data cell behave like a row header cell.

This allows speech synthesizers to provide the relevant course name upon request or to state it immediately before each cell's content. Users browsing a table with a speech-based user agent may wish to hear an explanation of a cell's contents in addition to the contents themselves. One way the user might provide an explanation is by speaking associated header information before speaking the data cell's contents see the section on associating header information with data cells.

Users may also want information about more than one cell, in which case header information provided at the cell level by headers , scope , and abbr may not provide adequate context.

Consider the following table, which classifies expenses for meals, hotels, and transport in two locations San Jose and Seattle over several days:. Each query involves a computation by the user agent that may involve zero or more cells. In order to determine, for example, the costs of meals on 25 August, the user agent must know which table cells refer to "Meals" all of them and which refer to "Dates" specifically, 25 August , and find the intersection of the two sets.

To accommodate this type of query, the HTML 4 table model allows authors to place cell headers and data into categories. For example, for the travel expense table, an author could group the header cells "San Jose" and "Seattle" into the category "Location", the headers "Meals", "Hotels", and "Transport" in the category "Expenses", and the four days into the category "Date".

The previous three questions would then have the following meanings:. Authors categorize a header or data cell by setting the axis attribute for the cell.

For instance, in the travel expense table, the cell containing the information "San Jose" could be placed in the "Location" category as follows:. Any cell containing information related to "San Jose" should refer to this header cell via either the headers or the scope attribute. Thus, meal expenses for Aug should be marked up to refer to id attribute whose value here is "a6" of the "San Jose" header cell:. Each headers attribute provides a list of id references.

Authors may thus categorize a given cell in any number of ways or, along any number of "headers", hence the name. Note that marking up the table this way also allows user agents to avoid confusing the user with unwanted information. For instance, if a speech synthesizer were to speak all of the figures in the "Meals" column of this table in response to the query "What were all my meal expenses?

By carefully categorizing cell data, authors allow user agents to make important semantic distinctions when rendering. Of course, there is no limit to how authors may categorize information in a table. In the travel expense table, for example, we could add the additional categories "subtotals" and "totals".

This specification does not require user agents to handle information provided by the axis attribute, nor does it make any recommendations about how user agents may present axis information to users or how users may query the user agent about this information. However, user agents, particularly speech synthesizers, may want to factor out information common to several cells that are the result of a query.

For instance, if the user asks "What did I spend for meals in San Jose? A user agent speaking this information might read it:. User agents that support this type of rendering should allow user agents a means to customize rendering e.

In the absence of header information from either the scope or headers attribute, user agents may construct header information according to the following algorithm.

The goal of the algorithm is to find an ordered list of headers. In the following description of the algorithm the table directionality is assumed to be left-to-right. This sample illustrates grouped rows and columns. The frame and rules attributes tell the user agent which borders and rules to render.

This attribute specifies the position of the table with respect to the document. Permitted values: left: The table is to the left of the document. When the value is a percentage value, the value is relative to the user agent's available horizontal space. In the absence of any width specification, table width is determined by the user agent. Attributes defined elsewhere id , class document-wide identifiers lang language information , dir text direction title element title style inline style information onclick , ondblclick , onmousedown , onmouseup , onmouseover , onmousemove , onmouseout , onkeypress , onkeydown , onkeyup intrinsic events bgcolor background color frame , rules , border borders and rules cellspacing , cellpadding cell margins.

For visual user agents, this attribute specifies the position of the caption with respect to the table. Possible values: top: The caption is at the top of the table. This is the default value. Attributes defined elsewhere id , class document-wide identifiers lang language information , dir text direction title element title style inline style information onclick , ondblclick , onmousedown , onmouseup , onmouseover , onmousemove , onmouseout , onkeypress , onkeydown , onkeyup intrinsic events.

Attributes defined elsewhere id , class document-wide identifiers lang language information , dir text direction title element title style inline style information onclick , ondblclick , onmousedown , onmouseup , onmouseover , onmousemove , onmouseout , onkeypress , onkeydown , onkeyup intrinsic events align , char , charoff , valign cell alignment. This example illustrates the order and structure of table heads, feet, and bodies. The default value for this attribute is 1 i. Attributes defined elsewhere id , class document-wide identifiers lang language information , dir text direction title element title style inline style information onclick , ondblclick , onmousedown , onmouseup , onmouseover , onmousemove , onmouseout , onkeypress , onkeydown , onkeyup intrinsic events bgcolor background color align , char , charoff , valign cell alignment.

A header row First row of data Second row of data The value of this attribute is a space-separated list of cell names; those cells must be named by setting their id attribute. Authors generally use the headers attribute to help non-visual user agents render header information about data cells e.

See also the scope attribute. This attribute may be used in place of the headers attribute, particularly for simple tables. When specified, this attribute must have one of the following values: row: The current cell provides header information for the rest of the row that contains it see also the section on table directionality.

Abbreviated names should be short since user agents may render them repeatedly. For instance, speech synthesizers may render the abbreviated headers relating to a particular cell before rendering that cell's content. User agents may give users access to these categories e. Please consult the section on categorizing cells for more information. The value of this attribute is a comma-separated list of category names.

The default value of this attribute is one "1". Interview Questions. Company Questions. Artificial Intelligence. Cloud Computing. Data Science. Angular 7. Machine Learning. Data Structures. Operating System.

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