<merror>

  • Revision slug: MathML/Element/merror
  • Revision title: merror
  • Revision id: 303551
  • Created:
  • Creator: fscholz
  • Is current revision? No
  • Comment

Revision Content

The MathML <merror> element is used to display contents as error messages. In Firefox this error message is rendered similar to the typical XML error message. Note that this error is not thrown when your MathML markup is wrong or not well-formed XML. You will still get an XML parsing error (in case of the XHTML notation of MathML), which has nothing to do with <merror>.

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, #rrggbb and HTML color names.
mathcolor
The text color and also the fraction line color. You can use #rgb, #rrggbb and HTML color names.

Examples

<math>

<merror>
  <mrow>
    <mtext> Division by zero: </mtext>
    <mfrac>
      <mn> 1 </mn>
      <mn> 0 </mn>
    </mfrac>
  </mrow>
</merror>

</math>

Browser compatibility

{{ CompatibilityTable() }}

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support {{ CompatNo() }} {{ CompatGeckoDesktop("1.0") }} {{ CompatNo() }} 9.5 5.1
href {{ CompatNo() }} {{ CompatGeckoDesktop("7.0") }} {{ CompatNo() }} {{ CompatNo() }} {{ CompatNo() }}
mathbackground {{ CompatNo() }} {{ CompatGeckoDesktop("2.0") }} {{ CompatNo() }} {{ CompatNo() }} 5.1
mathcolor {{ CompatNo() }} {{ CompatGeckoDesktop("2.0") }} {{ CompatNo() }} {{ CompatNo() }} 5.1
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support {{ CompatNo() }} {{ CompatNo() }} {{ CompatGeckoMobile("1.0") }} {{ CompatNo() }} {{ CompatNo() }} {{ CompatNo() }}
href {{ CompatNo() }} {{ CompatNo() }} {{ CompatGeckoMobile("7.0") }} {{ CompatNo() }} {{ CompatNo() }} {{ CompatNo() }}
mathbackground {{ CompatNo() }} {{ CompatNo() }} {{ CompatGeckoMobile("2.0") }} {{ CompatNo() }} {{ CompatNo() }} {{ CompatNo() }}
mathcolor {{ CompatNo() }} {{ CompatNo() }} {{ CompatGeckoMobile("2.0") }} {{ CompatNo() }} {{ CompatNo() }} {{ CompatNo() }}

Specifications

Specification Status Comment
{{ SpecName('MathML3', 'chapter3.html#presm.merror', 'maction') }} {{ Spec2('MathML3') }} Current specification
{{ SpecName('MathML2', 'chapter3.html#presm.merror', 'maction') }} {{ Spec2('MathML2') }} Initial specification

Revision Source

<p>The MathML <code>&lt;merror&gt;</code> element is used to display contents as error messages. In Firefox this error message is rendered similar to the typical XML error message. Note that this error is<strong> not</strong> thrown when your MathML markup is wrong or not well-formed XML. You will still get an XML&nbsp;parsing error (in case of the XHTML notation of MathML), which has nothing to do with <code>&lt;merror&gt;</code>.</p>
<h2 id="Attributes">Attributes</h2>
<dl>
  <dt id="attr-class-id-style">
    class, id, style</dt>
  <dd>
    Provided for use with <a href="/en-US/docs/CSS">stylesheets</a>.</dd>
  <dt id="attr-href">
    href</dt>
  <dd>
    Used to set a hyperlink to a specified URI.</dd>
  <dt id="attr-mathbackground">
    mathbackground</dt>
  <dd>
    The background color. You can use <code>#rgb</code>, <code>#rrggbb</code> and <a href="/en-US/docs/CSS/color_value#Color_Keywords">HTML color names</a>.</dd>
  <dt id="attr-mathcolor">
    mathcolor</dt>
  <dd>
    The text color and also the fraction line color. You can use <code>#rgb</code>, <code>#rrggbb</code> and <a href="/en-US/docs/CSS/color_value#Color_Keywords">HTML color names</a>.</dd>
</dl>
<h2 id="Examples">Examples</h2>
<pre class="brush: html">
&lt;math&gt;

&lt;merror&gt;
  &lt;mrow&gt;
    &lt;mtext&gt; Division by zero: &lt;/mtext&gt;
    &lt;mfrac&gt;
      &lt;mn&gt; 1 &lt;/mn&gt;
      &lt;mn&gt; 0 &lt;/mn&gt;
    &lt;/mfrac&gt;
  &lt;/mrow&gt;
&lt;/merror&gt;

&lt;/math&gt;
</pre>
<h2 id="Browser_compatibility">Browser compatibility</h2>
<p>{{ CompatibilityTable() }}</p>
<div id="compat-desktop">
  <table class="compat-table">
    <tbody>
      <tr>
        <th>Feature</th>
        <th>Chrome</th>
        <th>Firefox (Gecko)</th>
        <th>Internet Explorer</th>
        <th>Opera</th>
        <th>Safari</th>
      </tr>
      <tr>
        <td>Basic support</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatGeckoDesktop("1.0") }}</td>
        <td>{{ CompatNo() }}</td>
        <td>9.5</td>
        <td>5.1</td>
      </tr>
      <tr>
        <td><code>href</code></td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatGeckoDesktop("7.0") }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
      </tr>
      <tr>
        <td><code>mathbackground</code></td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatGeckoDesktop("2.0") }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
        <td>5.1</td>
      </tr>
      <tr>
        <td><code>mathcolor</code></td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatGeckoDesktop("2.0") }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
        <td>5.1</td>
      </tr>
    </tbody>
  </table>
</div>
<div id="compat-mobile">
  <table class="compat-table">
    <tbody>
      <tr>
        <th>Feature</th>
        <th>Android</th>
        <th>Chrome for Android</th>
        <th>Firefox Mobile (Gecko)</th>
        <th>IE Mobile</th>
        <th>Opera Mobile</th>
        <th>Safari Mobile</th>
      </tr>
      <tr>
        <td>Basic support</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatGeckoMobile("1.0") }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
      </tr>
      <tr>
        <td><code>href</code></td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatGeckoMobile("7.0") }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
      </tr>
      <tr>
        <td><code>mathbackground</code></td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatGeckoMobile("2.0") }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
      </tr>
      <tr>
        <td><code>mathcolor</code></td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatGeckoMobile("2.0") }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
        <td>{{ CompatNo() }}</td>
      </tr>
    </tbody>
  </table>
</div>
<h2 id="Specifications" name="Specifications">Specifications</h2>
<table class="standard-table" height="49" width="1000">
  <thead>
    <tr>
      <th scope="col">Specification</th>
      <th scope="col">Status</th>
      <th scope="col">Comment</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>{{ SpecName('MathML3', 'chapter3.html#presm.merror', 'maction') }}</td>
      <td>{{ Spec2('MathML3') }}</td>
      <td>Current specification</td>
    </tr>
    <tr>
      <td>{{ SpecName('MathML2', 'chapter3.html#presm.merror', 'maction') }}</td>
      <td>{{ Spec2('MathML2') }}</td>
      <td>Initial specification</td>
    </tr>
  </tbody>
</table>
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