php - 当元素通过 mysql 显示时，Jquery 事件不会触发

Question

我有一些从mysql输入的内容，当点击时应该触发alert()... 但是，这不起作用...

这是我从 php/get_answers.php 输入的代码

<?php session_start(); ?>
<?php require_once("../includes/include_all.php"); ?>
<?php $answers = $question->get_answers_for_question($_GET['id']); ?>
<?php while($row = $answers->fetch_array()){ ?>
  <!-- ALL ANSWERS HERE -->
  <div class = 'answer-row'>
    <div class = 'answer-side'>
        <div class = 'arrow-contain-answer' type = 'answer' id = 'arrow-up' answer-id = '<?php echo $row["id"]; ?>'></div>
        <div class = 'answer-votes-contain'>
            <?php echo $row['popularity']; ?>
        </div>
        <div class = 'arrow-contain-answer' id = 'arrow-down'answer-id = '<?php echo $row["id"]; ?>'></div>
      </div>

    <div class = 'answer-content'>
      <?php 
        echo $row['content'];
      ?>
    </div>

    <div class = 'actions'>
        <a href = '#' class= 'add-comment' id = '<?php echo $row["id"]; ?>'> add comment </a>
    </div>

  </div>

<?php } ?>

这是显示它的页面上的 jquery:

$(".arrow-contain-answer").click(function(){
    alert();
});

我想要发生的是，当有人单击“arrow-contain-answer”类的元素时，就会发生一个事件。

我想我之前在通过 mysql/php 将元素“馈送到”页面时遇到过问题。

Answer 1

$(document).on("click", ".arrow-contain-answer", function(){
    alert();
});

尝试用这种方式动态添加元素!