I was using:
.fb-comments, .fb-comments span, .fb-comments iframe[style] {
width: 100% !important;
}
To make Facebook Comments responsi
Here's a new CSS-only solution. Did this for a project I'm working on today (July 16, 2014) and it works beautifully.
.fb_iframe_widget,
.fb_iframe_widget span,
.fb_iframe_widget span iframe[style] {
min-width: 100% !important;
width: 100% !important;
}
The trick are data-width: 100%
and min-width: 100% !important; width: 100% !important;