javascript - 使用 jQuery 获取属性值

Question

我试图在 jQuery 中获取属性值，但不起作用，我的代码报告未定义。这是一个例子:

console.log($(".btn-causas input").find(".active input").attr('d'));

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="btn-group btn-causas" data-toggle="buttons">
  <label class="btn btn-info ">
    <input type="radio" name="options" id="optiond1" class="btncauses" autocomplete="off" d="security_alert">Security
  </label>
  <label class="btn btn-info ">
    <input type="radio" name="options" id="optiond1" class="btncauses" autocomplete="off" d="strike">Strike
  </label>
  <label class="btn btn-info active">
    <input type="radio" name="options" id="optiond1" class="btncauses" autocomplete="off" d="dontknow">I DON'T
  </label>
</div>

Answer 1

选择器可以简单地完成，如下所示:

$(".btn-causas .active input").attr('d');

希望这有帮助。

console.log( $(".btn-causas .active input").attr('d') );

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="btn-group btn-causas" data-toggle="buttons">
  <label class="btn btn-info ">
    <input type="radio" name="options" id="optiond1" class="btncauses" autocomplete="off" d="security_alert"> Security
  </label>
  <label class="btn btn-info ">
    <input type="radio" name="options" id="optiond1" class="btncauses" autocomplete="off" d="strike"> Strike
  </label>
  <label class="btn btn-info active">
    <input type="radio" name="options" id="optiond1" class="btncauses" autocomplete="off" d="dontknow"> I DON'T
  </label>
</div>