如何在reveal.js中嵌入openstreetmap iframe

Question

我想在我的reveal.js演示文稿中嵌入来自openstreetmap的iframe，因为它没有开箱即用。 有什么建议吗？

<iframe width="425" height="350" frameborder="0" scrolling="no" marginheight="0" marginwidth="0" src="https://www.openstreetmap.org/export/embed.html?bbox=5.124435424804688%2C45.05072537350321%2C5.890731811523438%2C45.322219956396964&amp;layer=mapnik&amp;marker=45.186634524469866%2C5.5075836181640625" style="border: 1px solid black"></iframe>
<br/>
<small><a href="https://www.openstreetmap.org/?mlat=45.1866&amp;mlon=5.5076#map=11/45.1866/5.5076">View Larger Map</a></small>

结果是一个空框