float버그 float 세로값 적용 안될경우

익스 하위 버전에서 float  height값이 적용이 안되는 경우
CSS에 넣어놓고 사용하세요.

/* float 세로값 적용안되는 버그에 사용 */
.clearfix:after {
  content: ".";              /* the period is placed on the page as the last thing before the div closes */
 display: block;          /* inline elements don't respond to the clear property */
    height: 0;                  /* ensure the period is not visible */
    clear: both;               /* make the container clear the period */
    visibility: hidden;      /* further ensures the period is not visible */
}

.clearfix {display: inline-block;}   /* a fix for IE Mac */

* html .clearfix {height: 1%;}
.clearfix {display: block;}