| <style> | |
| ::highlight(foo) { | |
| color: blue; | |
| background-color: cyan; | |
| } | |
| </style> | |
| <span id='span-iframe'>abc</span> | |
| <script> | |
| let r = new Range(); | |
| r.setStart(document.querySelector('#span-iframe'), 0); | |
| r.setEnd(document.querySelector('#span-iframe'), 1); | |
| CSS.highlights.set('foo', new Highlight(r)); | |
| </script> |