HTML5 MathML <mpadded> Tag

Definition and usage

The <mpadded> element modifies the bounding box reported for its child content. The width, height and depth attributes change the reported dimensions, lspace adds leading space, and voffset shifts the content vertically. Values may be absolute (like 5px) or relative using + and - prefixes.

Syntax

<mpadded width="+5px" lspace="3px" voffset="2px">
  <!-- content -->
</mpadded>

Example

<math>
  <mrow>
    <mi>a</mi>
    <mpadded lspace="6px" width="+6px">
      <mo>+</mo>
    </mpadded>
    <mi>b</mi>
  </mrow>
</math>

The <mpadded> wrapper adds leading space before the + operator and extends its reported width, spreading the term out horizontally.