| <!DOCTYPE html> | |
| <p>Horizontal operators or non-stretchy operators inside an mrow element should not stretch.</p> | |
| <math> | |
| <mrow> | |
| <mspace height="100px" width="10px" mathbackground="red"/> | |
| <mo lspace="0px" rspace="0px">_</mo> <!-- stretchy horizontal operator --> | |
| <mo lspace="0px" rspace="0px" stretchy="false">|</mo> <!-- non-stretchy vertical operator --> | |
| </mrow> | |
| </math> |