原生js获取css样式

var ele = document.getElementById("eleid");
1：ele.style.元素名称

2：var style = window.getComputedStyle ? window.getComputedStyle(ele, null) : ele.currentStyle; 　　style.元素名称;

https://www.zhangxinxu.com/wordpress/2012/05/getcomputedstyle-js-getpropertyvalue-currentstyle/