Wrap Youtube <iframe>in a parent element with .embed-responsiveand an aspect ratio.
Wrap Vimeo <iframe>in a parent element with .embed-responsiveand an aspect ratio.
Wrap Soundcloud <iframe>in a parent element with .embed-responsiveand an aspect ratio.
Aspect ratios can be customized with modifier classes.
| Class | Values |
|---|---|
class="embed-responsive embed-responsive-[value]" | 21by9 / 16by9 / 4by3 / 1by1 |