href

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.

The href global attribute creates a hyperlink on the MathML element pointing to the specified URL.

Example

The first equation links to the Wikipedia article about the mass-energy equivalence. The square root part of the second equation is a link to the SageMath calculation.

Note: You should avoid nesting MathML elements with the href attributes, just like <a> elements, as is will lead to user confusion and accessibility issues.

html, body { height: 100%; } body { display: grid; place-items: center; font-size: 1.5rem; }

html

<math display="block" href="https://en.wikipedia.org/wiki/Mass-energy_equivalence"> <mrow> <mi>E</mi> <mo>=</mo> <mi>m</mi> <msup> <mi>c</mi> <mn>2</mn> </msup> </mrow> </math> <math display="block"> <mi>c</mi> <mo>=</mo> <msqrt href="https://sagecell.sagemath.org/?z=eJwrLiwq0TCOM9I2iTPSBAAeqgPO"> <msup> <mn>3</mn> <mn>2</mn> </msup> <mo>+</mo> <msup> <mn>4</mn> <mn>2</mn> </msup> </msqrt> <mo>=</mo> <mn>5</mn> </math>