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 MathML element associates annotations with a MathML expression, for example its text source as a lightweight markup language or mathematical meaning expressed in a special XML dialect. Typically, its structure is:

  • a first child which is a MathML expression to be annotated.
  • subsequent or elements, the latter being reserved for XML formats such as Content MathML or SVG.

By default, only the first child of the element is rendered while the others have their display set to none.

css
semantics > :not(:first-child) {
  display: none;
}

Note: Legacy MathML specifications allowed renderers to decide the default rendering according to available annotations. The following rules for determining the visible child have been implemented in some browsers. See MathML 4 for the distinction between Presentation and Content MathML.

  • If no other rules apply: By default only the first child is rendered, which is supposed to be Presentation MathML.
  • If the first child is a Presentation MathML element other than or , render the first child.
  • If no Presentation MathML is found, render the first or child element of without a src attribute. For elements the encoding attribute must be equal to one of following values:
    • "application/mathml-presentation+xml"
    • "MathML-Presentation"
    • "SVG1.1"
    • "text/html"
    • "image/svg+xml"
    • "application/xml"

Note that "application/mathml+xml" is not mentioned here as it does not distinguish between Content or Presentation MathML.

Attributes

This element's attributes include the global MathML attributes.

Example

html

  
    
    
      
        x
        2
      
      +
      y
    

    
    
      
        
        
          
          x
          2
        
        y
      
    

    
    x^{2} + y

Technical summary

Implicit ARIA role None

Specifications

Specification
MathML Core
# semantics-and-presentation

Browser compatibility