css - 切换 Bootstrap 打开模态按钮的颜色 onClick 和关闭模态

Question

除了使用 jQuery 之外，是否有办法更改下面 .add-button 的颜色，以便它在单击时切换并在模式关闭时变回原样？

<div className="container">

  <button type="button" className="btn btn-md add-button" data-toggle="modal" data-target="#myModal">
    <span className="plus-sign">+</span> &nbsp; Contacts Keeper &nbsp;&nbsp;
  </button>

  <div className="modal fade" id="myModal" tabIndex="-1" role="dialog" aria-labelledby="myModalLabel">
    ...
</div>

Answer 1

与其在单击时更改按钮颜色，不如在悬停时更改它。因为只有在这种情况下，您才能看到可见的效果，否则当点击模式将关闭时。

一种方法是在css中使用伪类，另一种方法是使用js改变css样式。 我还注意到您正在使用 classNames，这意味着可能正在使用 react。 在这种情况下，在鼠标悬停时将预定义的 CSS 类附加到现有按钮的 CSS 类，并在鼠标移开时将其删除。

function changeColor(x) {
    x.style.background = "red";
}

function normalColor(x) {
      x.style.background = "white";
  }

#test-button:hover{
  color:red;
  background:green;
  }

#test-button:active{
  background:yellow;
  }

#close-button:hover{
  background:cyan;
  }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>


<!-- Button trigger modal -->
<button type="button" id="test-button" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
  Launch demo modal1
</button>

<!-- Button trigger modal -->
<button type="button" id="test-button1" class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal1">
  Launch demo modal2
</button>

<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title" id="myModalLabel">Modal title1</h4>
      </div>
      <div class="modal-body">
        ...
      </div>
      <div class="modal-footer">
        <button type="button" id="close-button" class="btn btn-default" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>


<!-- Modal -->
<div class="modal fade" id="myModal1" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title" id="myModalLabel">Modal title2</h4>
      </div>
      <div class="modal-body">
        ...
      </div>
      <div class="modal-footer">
        <button type="button" id="close-button1" class="btn btn-default" data-dismiss="modal" onmouseover="changeColor(this)" onmouseout="normalColor(this)">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div>
  </div>
</div>