nl_tokens: 显示图片
pl_tokens: function ( <mask> , height ) { var start = scrollElem . scrollTop ( ) , end = start + height ; var elemTop = notDocment ? function ( ) { return item . offset ( ) . top - scrollElem . offset ( ) . top + start ; } ( ) : item . offset ( ) . top ; /* 始终只加载在当前屏范围内的图片 */ if ( elemTop >= start && elemTop <= end ) { if ( ! item . attr ( 'src' ) ) { var src = item . attr ( 'lay-src' ) ; layui . img ( src , function ( ) { var next = that . lazyimg . elem . eq ( index ) ; item . attr ( 'src' , src ) . removeAttr ( 'lay-src' ) ; /* 当前图片加载就绪后，检测下一个图片是否在当前屏 */ next [ 0 ] && render ( next ) ; index ++ ; } ) ; } } }