CSS3 selectors: disabled Selector

": Disabled" coincides with selector ": enabled" Instead selector for selecting unavailable form elements. To work properly, ": disabled" selector, to set "disabled" attribute in the HTML form element.

Example shows

By ": disabled" selector is not provided to the clear input box style.

HTML code:

<form action="#">
  <div>
    <input type="text" name="name" id="name" placeholder="我是可用输入框" />
  </div>
  <div>
    <input type="text" name="name" id="name" placeholder="我是不可用输入框" disabled />
  </div>
</form>  

CSS code

form {
  margin: 50px;
}
div {
  margin-bottom: 20px;
}
input {
  background: #fff;
  padding: 10px;
  border: 1px solid orange;
  border-radius: 3px;
}
input[type="text"]:disabled {
  background: rgba(0,0,0,.15);
  border: 1px solid rgba(0,0,0,.15);
  color: rgba(0,0,0,.15);
}