D3JS Understanding the join and function keys script src https d3js org d3 v7 min js script div div div div script d3 select body selectAll div data 6 7 8 d d function key join enter console log enter enter length enter append div text d d update console log update update length update text d d exit console log exit exit length exit remove console log d3 select body selectAll div data 6 7 8 d d function key join enter console log enter enter length enter append div text d d update console log update update length update text d d exit console log exit exit length exit remove script
exit length exit remove console log d3 select body selectAll div data 6 7 8 d d function key join enter console log enter enter length enter append div text d d update console log update update length update text d d exit console log exit exit length exit remove script