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>

Specifications

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

Browser compatibility

 

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic supportChrome No support NoEdge ? Firefox Full support 1IE No support NoOpera No support NoSafari Full support 6WebView Android No support NoChrome Android No support NoEdge Mobile ? Firefox Android Full support 4Opera Android No support NoSafari iOS Full support YesSamsung Internet Android ?
hrefChrome No support NoEdge ? Firefox Full support 7IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoEdge Mobile ? Firefox Android Full support 7Opera Android No support NoSafari iOS No support NoSamsung Internet Android ?
mathbackgroundChrome No support NoEdge ? Firefox Full support 4IE No support NoOpera No support NoSafari Full support 6WebView Android No support NoChrome Android No support NoEdge Mobile ? Firefox Android Full support 4Opera Android No support NoSafari iOS No support NoSamsung Internet Android ?
mathcolorChrome No support NoEdge ? Firefox Full support 4IE No support NoOpera No support NoSafari Full support 6WebView Android No support NoChrome Android No support NoEdge Mobile ? Firefox Android Full support 4Opera Android No support NoSafari iOS No support NoSamsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown

 

Document Tags and Contributors

Contributors to this page: lucian95, fscholz, Sheppy
Last updated by: lucian95,