console 命令行工具 X clear

console

const eL = document.querySelector("#ll");
const classN = 'i-age';
const nameList = eL.className.split(' ');
for(var i=0;i<nameList.length;i++) {
  console.log(nameList[i])
  if(classN ===nameList[i]) {
    console.log("has")
  }
}

<div id="ll" class="a b     c helloworld i-age"></div>