<mphantom> - MathML 编辑

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

Attributes

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 largeop and movablelimits on <mo>.
mathbackground: The background color. You can use #rgb, #rrggbb and HTML color names.

Sample rendering: x+ z

Rendering in your browser: $x + z$

<math>

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

</math>

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

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