full width bootstrap carousel code example

Example 1: size carousel bootstrap 4

.carousel .item {
  height: 300px;
}

.item img {
    position: absolute;
    top: 0;
    left: 0;
    min-height: 300px;
}

Example 2: bootstrap carousel dynamic height jquery

$(function(){
    $(document).ready(function(){
        var height = $(window).height();
var width = $(window).width();
var header =$('header.site-navbar').height();
var finalwidth =height-header;
// alert(finalwidth);
$('.carousel-item img').css('height',''+finalwidth+'px');
});
    });