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The MathML <msub> element is used to attach a subscript to an expression.
It uses the following syntax: <msub> base subscript </msub>.
Attributes
- 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. - subscriptshift
- The minimum space by which to shift the subscript below the baseline of the expression, as a length value.
Examples
Rendering: 
<math> <msub> <mi>X</mi> <mn>1</mn> </msub> </math>
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | Not supported (24 only) | 1.0 (1.7 or earlier) | Not supported | 9.5 | 5.1 |
href |
Not supported WebKit bug 85733 | 7.0 (7.0) | Not supported | Not supported | Not supported WebKit bug 85733 |
mathbackground |
Not supported (24 only) | 4.0 (2.0) | Not supported | Not supported | 5.1 |
mathcolor |
Not supported (24 only) | 4.0 (2.0) | Not supported | Not supported | 5.1 |
subscriptshift |
Not supported | 1.0 (1.7 or earlier) | Not supported | Not supported | Not supported |
| 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 |
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 |
subscriptshift |
Not supported | Not supported | 1.0 (1.0) | Not supported | Not supported | Not supported |
Gecko-specific notes
- Starting with Gecko 26.0 (Firefox 26 / Thunderbird 26 / SeaMonkey 2.23) it is no longer possible to use
<none />as a child element. The rendering has been made more consistent with equivalent configurations of<msup>and<mmultiscripts>and a bug with an incorrect applicationof thesuperscriptshiftattribute has been fixed (see bug 827713 for details).
Specifications
| Specification | Status | Comment |
|---|---|---|
| MathML 3.0 | Recommendation | Current specification |
| MathML 2.0 | Recommendation | Initial specification |
See also
<msup>(Superscript)<msubsup>(Subscript-superscript pair)<mmultiscripts>(Prescripts and tensor indices)