Js method to operate custom attributes:
var testEle = document.getElementByIdx_x("test")
testEle.setAttribute("test","aaa"); // 设置
testEle.getAttribute("test")； //获取
testEle.attributes["test"].nodeValue; // 获取
Jquery method to operate custom attributes:
$("#test").attr("test","aaa") // 设置
$("#test").removeAttr("test") // 删除
var testAttr = "ddd";
$('#test[test="'+ testAttr +'"]')
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
