# <mfenced>

The MathML `<mfenced>` element provides the possibility to add custom opening and closing parentheses (such as brackets) and separators (such as commas or semicolons) to an expression.

## Attributes

class, id, style
Provided for use with stylesheets.
close
A string for the closing delimiter. The default value is `")`" and any white space is trimmed.
href
Used to set a hyperlink to a specified URI.
mathbackground
The background color. You can use `#rgb`, `#rrggbb` and HTML color names.
mathcolor
The text color and also the fraction line color. You can use `#rgb`, `#rrggbb` and HTML color names.
open
A string for the opening delimiter. The default value is `"("` and any white space is trimmed.
separators
A sequence of zero or more characters to be used for different separators, optionally divided by white space, which is ignored. The default value is ",". By specifying more than one character, it is possible to set different separators for each argument in the expression. If there are too many separators, all excess is ignored. If there are too few separators in the expression, the last specified separator is repeated.

## Examples

### The last separator is repeated (`,`)

Sample rendering:

Rendering in your browser: $\left\{a;b;c,d,e\right\}$

```[itex]
<mfenced open="{" close="}" separators=";;,">
<mi>a</mi>
<mi>b</mi>
<mi>c</mi>
<mi>d</mi>
<mi>e</mi>
</mfenced>
[/itex]
```

### All excess is ignored (`,`)

Sample rendering:

Rendering in your browser: $\left[a|b|c|d|e\right]$

```[itex]
<mfenced open="[" close="]" separators="||||,">
<mi>a</mi>
<mi>b</mi>
<mi>c</mi>
<mi>d</mi>
<mi>e</mi>
</mfenced>
[/itex]
```

## Specifications

Specification Status Comment
MathML 3.0
The definition of 'mfenced' in that specification.
Recommendation Current specification
MathML 2.0
The definition of 'mfenced' in that specification.
Recommendation Initial specification

## Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support No support 1.0 (1.7 or earlier) No support No support 5.1
`href` No support 7.0 (7.0) No support No support 10.0 WebKit bug 85733
`mathbackground` No support 4.0 (2.0) No support No support 5.1
`mathcolor` No support 4.0 (2.0) No support No support 5.1
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support No support No support 1.0 (1.0) No support No support No support
`href` No support No support 7.0 (7.0) No support No support No support
`mathbackground` No support No support 4.0 (2.0) No support No support No support
`mathcolor` No support No support 4.0 (2.0) No support No support No support

## Document Tags and Contributors

Tags:
Contributors to this page: Yaffle, fscholz, fred.wang, Sheppy, jswisher
Last updated by: Yaffle,