https://en.wikipedia.org/wiki/Internet_Explorer_box_model_bug https://en.wikipedia.org/wiki/Internet_Explorer_box_model_bu... The old IE old model is exactly b

https://en.wikipedia.org/wiki/Internet_Explorer_box_model_bug https://en.wikipedia.org/wiki/Internet_Explorer_box_model_bu... The old IE old model is exactly box-sizing:border-box;