currentStyle getComputedStyle?

function getStyle(obj,attr){
  return obj.currentStyle?obj.currentStyle[attr]:getComputedStyle(obj)[attr];
}

为什么我在调用这个函数的时候，总是报错 Uncaught TypeError: Failed to execute 'getComputedStyle' on 'Window': parameter 1 is not of type 'Element'. 后者是 currentStyle undefined的错误

2017哎呦不错

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2回答

cnyballk

<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <input id="a" value="1"></input> </body> </html> <script src="try.js"></script> <script> function getStyle(obj,attr){ return obj.currentStyle?obj.currentStyle[attr]:getComputedStyle(obj)[attr]; } var a = document.getElementById('a'); console.log(getStyle(a,"width")) </script>

HalfAnHour

说得很清楚啊，语法错误：getComputedStyle在window执行失败：第一个参数不是一个节点类型。后面那个currentStyle未定义

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