layer popup layer plug-in problem

<code>$('.am-g.trends').on('click','.ex-main-img', function () {
        layer.open({
            type: 1,
            title: false,
            closeBtn: 0,
            area: '500px',
            skin: 'layui-layer-nobg', //没有背景色
            shadeClose: true,
            content: $(this)
        });
    });
</code>

I used the layer plug-in, clicked on the picture, and a magnified picture of itself popped up, but it disappeared. I wonder if anyone has a similar experience