要在用户单击div时隐藏div，请尝试运行以下代码
<!DOCTYPE html>
<html>
<body>
<script>
window.onload = function(){
var hideMe = document.getElementById('hideMe');
document.onclick = function(e){
if(e.target.id !== 'hideMe'){
hideMe.style.display = 'none';
}
};
};
</script>
<div id="hideMe">Click outside this div and hide it.</div>
</body>
</html>