The MathML <munder> element is used to attach an accent or a limit under an expression. It uses the following syntax: <munder> base underscript </munder>
Attributes
- accentunder
- If true, the element is an accent, which is drawn closer to the base expression.
 Iffalse(default value), the element is a limit under the base expression.
- align
- The alignment of the underscript. Possible values are: left,center, andright.
- class, id, style
- Provided for use with stylesheets.
- href
- Used to set a hyperlink to a specified URI.
- mathbackground
- The background color. You can use #rgb,#rrggbband HTML color names.
- mathcolor
- The text color. You can use #rgb,#rrggbband HTML color names.
Examples
Sample rendering: 
Rendering in your browser:
<math>
<munder accentunder="true">
  <mrow>
    <mi> x </mi>
    <mo> + </mo>
    <mi> y </mi>
    <mo> + </mo>
    <mi> z </mi>
  </mrow>
  <mo> ⏟ <!--BOTTOM CURLY BRACKET--> </mo>
</munder> 
</math>
Specifications
| Specification | Status | Comment | 
|---|---|---|
| MathML 3.0 The definition of 'munder' in that specification. | Recommendation | Current specification | 
| MathML 2.0 The definition of 'munder' in that specification. | Recommendation | Initial specification | 
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari | 
|---|---|---|---|---|---|
| Basic support | Not supported | 1.0 (1.7 or earlier) | Not supported | Not supported | 5.1 | 
| accentunder | Not supported | 1.0 (1.7 or earlier) | Not supported | Not supported | Not supported | 
| align | Not supported | 12.0 (12.0) | Not supported | Not supported | Not supported | 
| href | Not supported | 7.0 (7.0) | Not supported | Not supported | Not supported | 
| mathbackground | Not supported | 4.0 (2.0) | Not supported | Not supported | 5.1 | 
| mathcolor | Not supported | 4.0 (2.0) | Not supported | Not supported | 5.1 | 
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | 
|---|---|---|---|---|---|---|
| Basic support | Not supported | Not supported | 1.0 (1.0) | Not supported | Not supported | Not supported | 
| accentunder | Not supported | Not supported | 1.0 (1.0) | Not supported | Not supported | Not supported | 
| align | Not supported | Not supported | 12.0 (12.0) | Not supported | Not supported | Not supported | 
| href | Not supported | Not supported | 7.0 (7.0) | Not supported | Not supported | Not supported | 
| mathbackground | Not supported | Not supported | 4.0 (2.0) | Not supported | Not supported | Not supported | 
| mathcolor | Not supported | Not supported | 4.0 (2.0) | Not supported | Not supported | Not supported | 
See also
- <mover>(Overscript)
- <munderover>(Underscript-overscript pair)