我有一个看起来像这样的函数:
$(".container").on("click", ".comment:first-child > .like_btn", function () {
console.log("it works!");
});
.comment
中的.container
被动态添加。我想做的是检测是否单击了第一个评论的“赞”按钮。但是,我现在所拥有的不起作用。我究竟做错了什么?
HTML
<div class="container">
<div class="comment"> //Dynamically added
<div class="like_btn"></div>
</div>
</div>
编辑:没有错误,只是click事件不会触发。
答案 0 :(得分:3)
尝试将处理程序附加到document
:
$(document).on("click", ".container .comment:first-child > .like_btn", function() {
console.log("it works!");
});
setTimeout(() => $(".comment").append("<div class='like_btn'>Like!</div>"), 2000);
<script src="https://code.jquery.com/jquery-3.3.1.js"></script>
<div class="container">
<div class="comment"> //Dynamically added
</div>
</div>
答案 1 :(得分:2)
一种解决方案是在document
元素上使用事件委托,如下所示:
$(document).ready(function()
{
$(".container").append(
`<div class="comment">
<div class="like_btn">LIKE 1</div>
</div>
<div class="comment">
<div class="like_btn">LIKE 2</div>
</div>`
);
});
$(document).on("click", ".container .comment:first-child > .like_btn", function()
{
console.log("it works!");
});
.as-console {background-color:black !important; color:lime;}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="container">
</div>
但是,如果也未动态添加.container
元素,则您的代码应该可以正常工作,如以下示例所示:
$(document).ready(function()
{
$(".container").append(
`<div class="comment">
<div class="like_btn">LIKE 1</div>
</div>
<div class="comment">
<div class="like_btn">LIKE 2</div>
</div>`
);
});
$(".container").on("click", ".comment:first-child > .like_btn", function()
{
console.log("it works!");
});
.as-console {background-color:black !important; color:lime;}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="container">
</div>
答案 2 :(得分:0)
$(document).ready(function()
{
$(".container").append(
`<div class="comment">
<div class="like_btn">LIKE 1</div>
</div>
<div class="comment">
<div class="like_btn">LIKE 2</div>
</div>`
);
});
$(document).on("click", ".container div:first-of-type > .like_btn", function()
{
console.log("it works!");
});
.as-console {background-color:black !important; color:lime;}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="container">
</div>
答案 3 :(得分:-1)
尝试删除'>'
$('.container .comment .like-btn').on('click', function(){ //do something })