Question

我正在尝试创建常见问题解答，点击箭头我将显示答案。我正在使用此链接制作。

任何身体都可以建议我如何获得这些cls以便我可以修改以及如何放箭头。

Cls w3-btn w3-block w3-black w3-left-align和w3-container w3-hide我也想放箭头。

我的代码：

<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<body>
<div class="w3-container">
<button onclick="myFunction('Demo1')" class="w3-btn w3-block w3-black w3-left-align">Open Section 1</button>
<div id="Demo1" class="w3-container w3-hide">
  <h4>Section 1</h4>
  <p>Some text..</p>
</div>

</div>
<script>
function myFunction(id) {
    var x = document.getElementById(id);
    if (x.className.indexOf("w3-show") == -1) {
        x.className += " w3-show";
    } else { 
        x.className = x.className.replace(" w3-show", "");
    }
}
</script>
</body>
</html>

Answer 1

也许有点简单，但我认为这就是你要找的东西？

＆＃13;

#arrow {
  float: right;
  height: 20px;
  width: 20px;
}

＆＃13;

<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<body>
<div class="w3-container">
<button class="w3-btn w3-block w3-teal w3-left-align">Open Section 1<img id="arrow" src="http://golfergroups.com/img/arr.png" alt="arrow" onclick="myFunction('Demo1')" ></button>
<div id="Demo1" class="w3-container w3-hide">
  <h4>Section 1</h4>
  <p>Some text..</p>
</div>
<script>
function myFunction(id) {
    var x = document.getElementById(id);
    if (x.className.indexOf("w3-show") == -1) {
        x.className += " w3-show";
    } else { 
        x.className = x.className.replace(" w3-show", "");
    }
}
</script>
</body>
</html>

＆＃13;

如果它不起作用或者这不是您正在寻找的内容，请与我们联系。

Answer 2

希望这会对你有所帮助:)。

function myFunction(id) {
  var x = document.getElementById(id);
  if (x.className.indexOf("w3-show") == -1) {
    x.className += " w3-show";
  } else {
    x.className = x.className.replace(" w3-show", "");
  }
}

.w3-container,
.w3-panel {
  padding: 0.01em 16px;
}

.w3-black,
.w3-hover-black:hover {
  color: #fff!important;
  background-color: #000!important;
}

.w3-block {
  display: block;
  width: 100%;
}

.w3-btn,
.w3-button {
  border: none;
  display: inline-block;
  outline: 0;
  padding: 8px 16px;
  vertical-align: middle;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  background-color: inherit;
  text-align: center;
  cursor: pointer;
  white-space: nowrap;
}

.w3-btn,
.w3-button {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.w3-block {
  display: block;
  width: 100%;
}

.w3-left-align {
  text-align: left!important;
}

.w3-hide {
  display: none;
}

.w3-show-block,
.w3-show {
  display: block!important;
}

.w3-btn:hover {
  box-shadow: 0 8px 16px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
}

.FAQ1 {
  position: relative;
}

.FAQ1 :before {
  content: '';
  width: 14px;
  height: 14px;
  position: absolute;
  right: 10px;
  top: 9px;
  background-image: url(https://i.stack.imgur.com/3R9OU.png);
  background-repeat: no-repeat;
  background-size: cover;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<div class="w3-container">
  <div class="FAQ1">

    <button onclick="myFunction('Demo1')" class="w3-btn w3-block w3-black w3-left-align">Open Section 1</button>

    <div id="Demo1" class="w3-container w3-hide">
      <h4>Section 1</h4>
      <p>Some text..</p>
    </div>
  </div>


</div>

html中的DropDown问题

2 个答案: