纯Javascr ipt实现的网页取色器，大家经常在网页在线编辑器中见到，界面和系统自带的取色器差不多，这个是用纯JS实现的，有很高学习价值-Pure Javascr ipt implementation web eyedropper, which are often seen in the pages online editor, color picker interface and the system comes about, this is pure JS has a high learning value