index.md

---

title: scriptlevel
slug: Web/MathML/Global_attributes/scriptlevel
browser-compat: mathml.global_attributes.scriptlevel

---

{{QuickLinksWithSubPages("/en-us/docs/Web/MathML/Global_attributes")}}

The scriptlevel global attribute sets the math-depth of a MathML element. It allows overriding rules from the user agent stylesheet that define automatic calculation of font-size within MathML formulas.

Example

<!-- math-depth defaults to 0 on the <math> root. -->
<math style="font-size: 64pt">
  <msubsup>
    <!-- math-depth and font-size remain unchanged on the base. -->
    <mtext>BASE</mtext>
    <!-- math-depth defaults to add(1) within the subscript, so it
         is incremented by 1 and the font-size is scaled down once. -->
    <mtext>SUBSCRIPT</mtext>
    <!-- math-depth defaults to add(1) within the superscript too, but
         the scriptlevel attribute tells to increment it by 2 instead,
         so the font-size is actually scaled down twice. -->
    <mtext scriptlevel="+2">SUPERSCRIPT</mtext>
  </msubsup>
</math>

Syntax

<math scriptlevel="-1"> <!-- decrease math-depth by 1 -->
<math scriptlevel="+2"> <!-- increase math-depth by 2 -->
<math scriptlevel="0"> <!-- reset math-depth to 0 -->

Values

If <U> is an unsigned integer (i.e. with prefix sign symbol removed) then the accepted values are:

• <U>

  • : Sets the math-depth to value <U>. This will set font-size of the element to the same value as the one of elements at the specified depth.

• +<U>

  • : Sets the math-depth to value add(<U>). This will scale down font-size on the element <U> times.

• -<U>

  • : Sets the math-depth to value add(-<U>). This will scale up font-size on the element <U> times.

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• All global attributes.

• The displaystyle global attribute.

• {{cssxref("font-size")}}

• {{cssxref("math-depth")}}

• {{cssxref("math-style")}}