javascript - 添加覆盖后如何禁用 div 元素？

Question

我正在尝试在我的表单上添加叠加层。基本上我不希望用户访问表单并通过添加覆盖来阻止内容。我添加了覆盖，但我仍然可以在输入字段中输入。我该如何阻止它？

.overlay {
  background: rgba(0, 0, 0, .75);
  text-align: center;
  opacity: 0;
  width: 100 %;
  height: 100 %;
  -webkit-transition: all 0.3s ease - in -out;
  -moz-transition: all 0.3s ease - in -out;
  -o-transition: all 0.3s ease - in -out;
  -ms-transition: all 0.3s ease - in -out;
  transition: all 0.3s ease - in -out;
  opacity: 1;
}

 <h1>Hello Plunker!</h1>
<div class="overlay">
  <input type="text">First name
</div>

Answer 1

像这样？

.content {
  text-align: center;
  opacity: 0;
  width: 100%;
  height: 100%;
  position: relative;
  -webkit-transition: all 0.3s ease - in -out;
  -moz-transition: all 0.3s ease - in -out;
  -o-transition: all 0.3s ease - in -out;
  -ms-transition: all 0.3s ease - in -out;
  transition: all 0.3s ease - in -out;
  opacity: 1;
}

.overlay {
  background: rgba(0, 0, 0, .75);
  position: absolute;
  width: 100%;
  height: 100%;
}

<h1>Hello Plunker!</h1>
<div class="content">
  <div class="overlay">
  </div>
  
  <input type="text">First name
</div>

希望这对您有所帮助。