//css
        *{
            margin: 0;
            padding: 0;
        }
        .item{
            padding: 20px;
            float: left;
            border:1px solid #eee;
            font-size: 0;
        }
        .item img{
            width: 240px;
        }
        .content{
            margin: 0 auto;
        }
//script
    <script>
        var baseURL = "http://192.168.4.18:8000/"
        var url = "more"
        axios({
            url,
            baseURL,
            method:"get",
        }).then(res=>{
            var a = res.data;
            a.forEach(item=>{
                var htmlItem=`
                    <div class="item">
                        <img src=${item.imageUrl}>
                    </div>
                `
                $(".content").append(htmlItem)
            })
            var ww = $(window).width(); //获取窗口宽度
            var box = $(".item").outerWidth(); //获取item块宽度(包括内外边框)
            var num = Math.floor(ww/box); //得出行内item块个数
            var arr = [];
            $(".content").css({width:box*num + "px"})
            setTimeout(function(){
                $(".item").each((index,value)=>{
                    if(index<num){
                        var height = $(value).outerHeight();
                        console.log(height)
                        arr.push(height) //将第一行的item块高度加入一个列表中
                    }else{
                        var minHeight = Math.min(...arr); //找到高度最小的元素
                        var index = arr.indexOf(minHeight); //找到高度最小的元素再数组中的下标
                        var offsetLeft = $(".item").eq(index).offset().left; //找到其距矿口左边的距离
                        $(value).css({position:"absolute",left:offsetLeft,top:minHeight});
                        arr[index] = minHeight + $(value).outerHeight();//更新数组
                    }
                })
            },1000)
        })
    </script>

下拉刷新

        <script>
        var baseURL = "http://192.168.4.18:8000/"
        var url = "more"
        axios({
            url,
            baseURL,
            method:"get",
        }).then(res=>{
            var a = res.data;
            a.forEach(item=>{
                var htmlItem=`
                    <div class="item">
                        <img src=${item.imageUrl}>
                    </div>
                `
                $(".content").append(htmlItem)
            })
            var ww = $(window).width();
            var box = $(".item").outerWidth();
            var num = Math.floor(ww/box);
            var arr = [];
            $(".content").css({width:box*num + "px"})
            setTimeout(function(){
                $(".item").each((index,value)=>{
                    if(index<num){
                        var height = $(value).outerHeight();
                        console.log(height)
                        arr.push(height)
                    }else{
                        var minHeight = Math.min(...arr);
                        var index = arr.indexOf(minHeight);
                        var offsetLeft = $(".item").eq(index).offset().left;
                        $(value).css({position:"absolute",left:offsetLeft,top:minHeight});
                        arr[index] = minHeight + $(value).outerHeight();
                    }
                })
            },100)
        })
        axios({
            url,
            baseURL,
            method:"get",
        }).then(res=>{
            var a = res.data;
            a.forEach(item=>{
                var htmlItem=`
                    <div class="item">
                        <img src=${item.imageUrl}>
                    </div>
                `
                $(".content").append(htmlItem)
            })
            var ww = $(window).width();
            var box = $(".item").outerWidth();
            var num = Math.floor(ww/box);
            var arr = [];
            $(".content").css({width:box*num + "px"})
            setTimeout(function(){
                $(".item").each((index,value)=>{
                    if(index<num){
                        var height = $(value).outerHeight();
                        console.log(height)
                        arr.push(height)
                    }else{
                        var minHeight = Math.min(...arr);
                        var index = arr.indexOf(minHeight);
                        var offsetLeft = $(".item").eq(index).offset().left;
                        $(value).css({position:"absolute",left:offsetLeft,top:minHeight});
                        arr[index] = minHeight + $(value).outerHeight();
                    }
                })
            },100)
        })
        $(window).scroll(function(){
            var scrollTop = $(window).scrollTop(); //获取滚动条距离顶部的高
            var availHeight = $(window).height(); //获取可视区域的高
            var dw = $(document).height();  //获取内容区域的高
            console.log(scrollTop)
            if((scrollTop + availHeight) > dw -100){
                axios({
                    url,
                    baseURL,
                    method:"get",
                }).then(res=>{
                    var a = res.data;
                    a.forEach(item=>{
                        var htmlItem=`
                            <div class="item">
                                <img src=${item.imageUrl}>
                            </div>
                        `
                        $(".content").append(htmlItem)
                    })
                    var ww = $(window).width();
                    var box = $(".item").outerWidth();
                    var num = Math.floor(ww/box);
                    var arr = [];
                    $(".content").css({width:box*num + "px"})
                    setTimeout(function(){
                        $(".item").each((index,value)=>{
                            if(index<num){
                                var height = $(value).outerHeight();
                                console.log(height)
                                arr.push(height)
                            }else{
                                var minHeight = Math.min(...arr);
                                var index = arr.indexOf(minHeight);
                                var offsetLeft = $(".item").eq(index).offset().left;
                                $(value).css({position:"absolute",left:offsetLeft,top:minHeight});
                                arr[index] = minHeight + $(value).outerHeight();
                            }
                        })
                    },100)
                })  
            }
        })
    </script>