javascript - Absolute Center (Vertical & Horizontal) "Responsive" it does not work -

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i'm use bootstrap 3.3.5 , demo 30-lazy-load-images, problem container can not have fixed height(px), must "100% or auto" compatible responsive design.

check demo

.swiper-container {     width: 100%;     height: 500px; // work if star height eg 500px, need container responsive 100% or auto.

}

enter image description here

if set height: 100% or auto, .swiper-container height not initialize "0". how can solve this? image must centered lazy load

you use height:50vh; have swiper-container display half of screen height. or whatever want set height at.
responsive. 

.swiper-container {         width: 100%;         height: 50vh;     }

here fiddle.

for more info using vh please read this.


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