HTML/CSS YES/NO 滑块在选择是时显示更多字段

Question

我对 Web 开发比较陌生，如果能得到任何帮助，我将不胜感激。我有一个 HTML/CSS 滑块，当滑块处于“是”位置时，我想显示更多 txt 框字段，例如名字和主题。如果可能的话，我真的希望这些选项基于另一个下拉菜单。我该怎么做？

.switch {
  position: relative;
  display: block;
  vertical-align: top;
  width: 100px;
  height: 30px;
  padding: 3px;
  margin: 0 10px 10px 0;
  background: linear-gradient(to bottom, #eeeeee, #FFFFFF 25px);
  background-image: -webkit-linear-gradient(top, #eeeeee, #FFFFFF 25px);
  border-radius: 18px;
  box-shadow: inset 0 -1px white, inset 0 1px 1px rgba(0, 0, 0, 0.05);
  cursor: pointer;
}

.switch-input {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
}

.switch-label {
  position: relative;
  display: block;
  height: inherit;
  font-size: 10px;
  text-transform: uppercase;
  background: #eceeef;
  border-radius: inherit;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.12), inset 0 0 2px rgba(0, 0, 0, 0.15);
}

.switch-label:before,
.switch-label:after {
  position: absolute;
  top: 50%;
  margin-top: -.5em;
  line-height: 1;
  -webkit-transition: inherit;
  -moz-transition: inherit;
  -o-transition: inherit;
  transition: inherit;
}

.switch-label:before {
  content: attr(data-off);
  right: 11px;
  color: #aaaaaa;
  text-shadow: 0 1px rgba(255, 255, 255, 0.5);
}

.switch-label:after {
  content: attr(data-on);
  left: 11px;
  color: #FFFFFF;
  text-shadow: 0 1px rgba(0, 0, 0, 0.2);
  opacity: 0;
}

.switch-input:checked~.switch-label {
  background: #0088cc;
  border-color: #0088cc;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.15), inset 0 0 3px rgba(0, 0, 0, 0.2);
}

.switch-input:checked~.switch-label:before {
  opacity: 0;
}

.switch-input:checked~.switch-label:after {
  opacity: 1;
}

.switch-handle {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 28px;
  height: 28px;
  background: linear-gradient(to bottom, #FFFFFF 40%, #f0f0f0);
  background-image: -webkit-linear-gradient(top, #FFFFFF 40%, #f0f0f0);
  border-radius: 100%;
  box-shadow: 1px 1px 5px rgba(0, 0, 0, 0.2);
}

.switch-handle:before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  margin: -6px 0 0 -6px;
  width: 12px;
  height: 12px;
  background: linear-gradient(to bottom, #eeeeee, #FFFFFF);
  background-image: -webkit-linear-gradient(top, #eeeeee, #FFFFFF);
  border-radius: 6px;
  box-shadow: inset 0 1px rgba(0, 0, 0, 0.02);
}

.switch-input:checked~.switch-handle {
  left: 74px;
  box-shadow: -1px 1px 5px rgba(0, 0, 0, 0.2);
}


/* Transition

========================== */

.switch-label,
.switch-handle {
  transition: All 0.3s ease;
  -webkit-transition: All 0.3s ease;
  -moz-transition: All 0.3s ease;
  -o-transition: All 0.3s ease;
}

<div class="field">
  <label>send an email?</label>
  <label class="switch">
<input class="switch-input" type="checkbox" id="email" name="email" value=" 
{{values.email}}"/>
<span class="switch-label" data-on="Yes" data-off="No"></span>
<span class="switch-handle"></span>
</label>

Answer 1

如果您使用label，您有两个选项可以使标签有效。一种是将input 包裹在label 中，如下所示：

<label> Label text
  <input type="text … />
</label>

另一种选择是使用label上的for属性，这意味着当点击标签时，与for的值匹配的id被点击。

<input type="checkbox" id="myCheckbox" name="myCheckbox" value=" true" />
<label for="myCheckbox">Click the checkbox</label>

这是您应该为不带for 属性的非包装label 使用的选项。目前无效。

另一个label(.switch)封装了开关的UI，并没有失效。但是，我们可以使用for 属性另外 来包装开关内容，使两个labels 指向同一个id。这是labels 的混合方法，有效HTML。

我们为什么要这样做？因为要显示更多内容，我们需要将包含目标 id 的复选框在 DOM 中“向上”移动一个级别。完成此操作后，我们可以使用~ 选择器根据复选框的值显示/隐藏更多内容。

.switch {
  position: relative;
  display: block;
  vertical-align: top;
  width: 100px;
  height: 30px;
  padding: 3px;
  margin: 0 10px 10px 0;
  background: linear-gradient(to bottom, #eeeeee, #FFFFFF 25px);
  background-image: -webkit-linear-gradient(top, #eeeeee, #FFFFFF 25px);
  border-radius: 18px;
  box-shadow: inset 0 -1px white, inset 0 1px 1px rgba(0, 0, 0, 0.05);
  cursor: pointer;
}

.switch-input {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
}

.switch-label {
  position: relative;
  display: block;
  height: inherit;
  font-size: 10px;
  text-transform: uppercase;
  background: #eceeef;
  border-radius: inherit;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.12), inset 0 0 2px rgba(0, 0, 0, 0.15);
}

.switch-label:before,
.switch-label:after {
  position: absolute;
  top: 50%;
  margin-top: -.5em;
  line-height: 1;
  -webkit-transition: inherit;
  -moz-transition: inherit;
  -o-transition: inherit;
  transition: inherit;
}

.switch-label:before {
  content: attr(data-off);
  right: 11px;
  color: #aaaaaa;
  text-shadow: 0 1px rgba(255, 255, 255, 0.5);
}

.switch-label:after {
  content: attr(data-on);
  left: 11px;
  color: #FFFFFF;
  text-shadow: 0 1px rgba(0, 0, 0, 0.2);
  opacity: 0;
}

.switch-input:checked~.switch .switch-label {
  background: #0088cc;
  border-color: #0088cc;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.15), inset 0 0 3px rgba(0, 0, 0, 0.2);
}

.switch-input:checked~.switch .switch-label:before {
  opacity: 0;
}

.switch-input:checked~.switch .switch-label:after {
  opacity: 1;
}

.switch-handle {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 28px;
  height: 28px;
  background: linear-gradient(to bottom, #FFFFFF 40%, #f0f0f0);
  background-image: -webkit-linear-gradient(top, #FFFFFF 40%, #f0f0f0);
  border-radius: 100%;
  box-shadow: 1px 1px 5px rgba(0, 0, 0, 0.2);
}

.switch-handle:before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  margin: -6px 0 0 -6px;
  width: 12px;
  height: 12px;
  background: linear-gradient(to bottom, #eeeeee, #FFFFFF);
  background-image: -webkit-linear-gradient(top, #eeeeee, #FFFFFF);
  border-radius: 6px;
  box-shadow: inset 0 1px rgba(0, 0, 0, 0.02);
}

.switch-input:checked~.switch .switch-handle {
  left: 74px;
  box-shadow: -1px 1px 5px rgba(0, 0, 0, 0.2);
}

/* Transition

========================== */

.switch-label,
.switch-handle {
  transition: All 0.3s ease;
  -webkit-transition: All 0.3s ease;
  -moz-transition: All 0.3s ease;
  -o-transition: All 0.3s ease;
}

.show-more-fields {
  display: none;
}

.switch-input:checked~.show-more-fields {
  display: block;
}

<div class="field">
  <input class="switch-input" type="checkbox" id="email" name="email" value=" true" />
  <label for="email">send an email?</label>
  <label for="email" class="switch">
    <span class="switch-label" data-on="Yes" data-off="No"></span>
    <span class="switch-handle"></span>
  </label>
  <div class="show-more-fields">More content here</div>
</div>

jsFiddle