<merror>

Baseline 2023
Newly available

Since January 2023, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

The <merror> MathML element is used to display contents as error messages. The intent of this element is to provide a standard way for programs that generate MathML from other input to report syntax errors.

Attributes

This element accepts the global MathML attributes.

Examples

In the following example, <merror> is used to indicate a parsing error for some LaTeX-like input:

html
<math display="block">
  <mfrac>
    <merror>
      <mtext>Syntax error: \frac{1}</mtext>
    </merror>
    <mn>3</mn>
  </mfrac>
</math>

Technical summary

Specifications

Specification
MathML Core
# error-message-merror

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
merror

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support