如何通过JS来增加a标签的class样式

$(function(){

$(document).on("click"大拍衡,".nav-item>a",function(){

$(this).addClass("active"贺橡).parent("滚做.nav-item").siblings(".nav-item").children("a").removeClass("active")

})

})

如果好使，请给个采纳

<script>

var a = document.querySelectorAll("亩激a")

var className = ["food", "travel", "sport", "fashion"]

for (var i = 0i <a.lengthi++) {

a[i].className = className[i]

}

<闭派/迅态袜script>

---