确认删除元素
使用 confirm() 的一种方法是当某些 UI 操作对页面进行一些破坏性更改时，最好伴随通知和用户确认 - 例如在删除帖子消息之前：
<div id="post-102">
<p>I like Confirm modals.</p>
<a data-deletepost="post-102">Delete post</a>
</div>
<div id="post-103">
<p>That's way too cool!</p>
<a data-deletepost="post-103">Delete post</a>
</div>
// Collect all buttons
var deleteBtn = document.querySelectorAll("[data-deletepost]");
function deleteParentPost(event) {
event.preventDefault(); // Prevent page scroll jump on anchor click
if( confirm("Really Delete this post?") ) {
var post = document.getElementById( this.dataset.deletepost );
post.parentNode.removeChild(post);
// TODO: remove that post from database
} // else, do nothing
}
// Assign click event to buttons
[].forEach.call(deleteBtn, function(btn) {
btn.addEventListener("click", deleteParentPost, false);
});