I followed this post Making an iframe responsive to make iframes responsive.
# A test case
<div class="intrinsic-container">
<iframe frameborder="0" width="640" height="498" src="https://v.qq.com/iframe/player.html?vid=y0379t92gl9&tiny=0&auto=0" allowfullscreen></iframe>
</div>
# style.css
.intrinsic-container {
position: relative;
/* padding-bottom: 56.25%; /* 16:9 */
padding-bottom:75%; /* 4:3 */
/* padding-bottom: 66.66%; /* 3:2 */
/* padding-top: 25px; */
height: 0;
}
.intrinsic-container iframe {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
It works. My question is how to make iframes responsive for different aspect ratios of content areas, such as
- YouTube video:
width="560" height="315"
, the ratio is16:9
width="640" height="498"
, the ratio is4:3