How to make facebook comment box width 100%?

Question

i am using this code to put a facebook comment box to my page,

Answer 1

zeeshan your solution seems outdated and it looks like facebook updated their plugin and that broke the style.

Probably this works better for me as of now and I believe that this style will again broke when facebook update the way their plugins work.

.fb_iframe_widget,
.fb_iframe_widget span,
.fb_iframe_widget iframe[style]  {width: 100% !important;}

I encourage other contributors to add the more recent solution to this question when time comes.