<mphantom>

The MathML <mphantom> element is rendered invisibly, but dimensions (such as height, width, and baseline position) are still kept.

class, id, style

Provided for use with stylesheets.

displaystyle

A Boolean value specifying whether more vertical space is used for displayed equations or, if set to false, a more compact layout is used to display formulas. The main effect is that larger versions of operators are displayed, when displaystyle is set to true. See also movablelimits on <mo>.

mathbackground

The background color. You can use #rgb, #rrggbb and HTML color names.

Sample rendering:

Rendering in your browser: $x+\phantom{y+}z$

<math>

<mrow>
  <mi> x </mi>
  <mo> + </mo>
  <mphantom>
    <mi> y </mi>
    <mo> + </mo>
  </mphantom>
  <mi> z </mi>
</mrow>

</math>

• <mspace>
• <mpadded>