CSS-da float xususiyati va matnsiz ota-ona

Endi bizda parent klassli, matni yo'q, lekin child klassli ikkita blok-potomka bor div bor deylik:

html<div class="parent">
  <div class="child">1</div>
  <div class="child">2</div>
</div>

css.parent {
  width: 500px;
  border: 1px solid red;
  text-align: justify;
}
.child {
  width: 200px;
  height: 100px;
  border: 1px solid green;
}

Результат:

Keling, blok-potomkalarni chap tomonga suzuvchi qilaylik va nima bo'lishini ko'ramiz:

html<div class="parent">
  <div class="child">1</div>
  <div class="child">2</div>
</div>

css.parent {
  width: 500px;
  border: 1px solid red;
  text-align: justify;
}
.child {
  float: left;
  width: 200px;
  height: 100px;
  border: 1px solid green;
}

Результат:

Ko'rib turganimizdek, blok-potomkalar qatorga jimlandi, ammo, ota-onaning balandligi yo'qoldi va bizning bloklarimiz uning ostiga chiqib ketdi.

Bu xatti-harakat bizga allaqachon ma'lum. Muammoni hal qilish uchun clearfix-dan foydalanish kerak. Buni amalga oshiramiz:

html<div class="parent">
  <div class="child">1</div>
  <div class="child">2</div>
  <div class="clearfix"></div>
</div>

css.parent {
  width: 500px;
  border: 1px solid red;
  text-align: justify;
}
.child {
  float: left;
  width: 200px;
  height: 100px;
  border: 1px solid green;
}

.clearfix {
  clear: both;
}

Результат: