单击项目时打印当前选定的项目

// HTML
<div id="project-list">
  <ul>
    <li data-project="project1">项目1</li>
    <li data-project="project2">项目2</li>
    <li data-project="project3">项目3</li>
  </ul>
</div>

// JavaScript
document.getElementById("project-list").addEventListener("click", function(event) {
  if (event.target.tagName === "LI") {
    var selectedProject = event.target.getAttribute("data-project");
    console.log("当前选定的项目是：" + selectedProject);
  }
});