Question

在下面的代码中，HTML和CSS代码工作正常，但JavaScript代码不会影响输出。 js代码用于文本字段中的淡出。

html代码：

  <ul class="tab-group">
    <li class="tab active"><a href="#signup">Sign Up</a></li>
    <li class="tab"><a href="#login">Log In</a></li>
  </ul>

  <div class="tab-content">
    <div id="signup">   
      <h1>Sign Up for Free</h1>

      <form action="/" method="post">

      <div class="top-row">
        <div class="field-wrap">
          <label>
            First Name<span class="req">*</span>
          </label>
          <input type="text" required autocomplete="off" />
        </div>

        <div class="field-wrap">
          <label>
            Last Name<span class="req">*</span>
          </label>
          <input type="text"required autocomplete="off"/>
        </div>
      </div>

      <div class="field-wrap">
        <label>
          Email Address<span class="req">*</span>
        </label>
        <input type="email"required autocomplete="off"/>
      </div>

      <div class="field-wrap">
        <label>
          Set A Password<span class="req">*</span>
        </label>
        <input type="password"required autocomplete="off"/>
      </div>

      <button type="submit" class="button button-block"/>Get Started</button>

      </form>

    </div>

    <div id="login">   
      <h1>Welcome Back!</h1>

      <form action="/" method="post">

        <div class="field-wrap">
        <label>
          Email Address<span class="req">*</span>
        </label>
        <input type="email"required autocomplete="off"/>
      </div>

      <div class="field-wrap">
        <label>
          Password<span class="req">*</span>
        </label>
        <input type="password"required autocomplete="off"/>
      </div>

      <p class="forgot"><a href="#">Forgot Password?</a></p>

      <button class="button button-block"/>Log In</button>

      </form>

    </div>

  </div><!-- tab-content -->

js code

    $('.form').find('input, textarea').on('keyup blur focus', function       (e) {

    var $this = $(this),
     label = $this.prev('label');

     if (e.type === 'keyup') {
        if ($this.val() === '') {
      label.removeClass('active highlight');
      } else {
      label.addClass('active highlight');
      }
      } else if (e.type === 'blur') {
    if( $this.val() === '' ) {
        label.removeClass('active highlight'); 
        } else {
        label.removeClass('highlight');   
        }   
       } else if (e.type === 'focus') {

       if( $this.val() === '' ) {
        label.removeClass('highlight'); 
        } 
        else if( $this.val() !== '' ) {
        label.addClass('highlight');
        }
        }

       });

      $('.tab a').on('click', function (e) {

     e.preventDefault();

      $(this).parent().addClass('active');
       $(this).parent().siblings().removeClass('active');

      target = $(this).attr('href');

       $('.tab-content > div').not(target).hide();

     $(target).fadeIn(600);

     });

css代码：

    @import "compass/css3";

$body-bg: #c1bdba;
$form-bg: #13232f;
$white: #ffffff;

$main: #1ab188;
$main-light: lighten($main,5%);
$main-dark: darken($main,5%);

$gray-light: #a0b3b0;
$gray: #ddd;

$thin: 300;
$normal: 400;
$bold: 600;
$br: 4px;

*, *:before, *:after {
box-sizing: border-box;
}

html {
overflow-y: scroll; 
}

body {
background:$body-bg;
font-family: 'Titillium Web', sans-serif;
}

a {
text-decoration:none;
color:$main;
transition:.5s ease;
&:hover {
color:$main-dark;
}
}

.form {
background:rgba($form-bg,.9);
padding: 40px;
max-width:600px;
margin:40px auto;
border-radius:$br;
box-shadow:0 4px 10px 4px rgba($form-bg,.3);
}

.tab-group {
list-style:none;
 padding:0;
 margin:0 0 40px 0;
 &:after {
 content: "";
 display: table;
 clear: both;
}
li a {
display:block;
text-decoration:none;
padding:15px;
background:rgba($gray-light,.25);
color:$gray-light;
font-size:20px;
float:left;
width:50%;
text-align:center;
cursor:pointer;
transition:.5s ease;
&:hover {
  background:$main-dark;
  color:$white;
}
}
.active a {
background:$main;
color:$white;
 }
}

.tab-content > div:last-child {
display:none;
}


 h1 {
 text-align:center;
  color:$white;
  font-weight:$thin;
  margin:0 0 40px;
  }

  label {
   position:absolute;
   transform:translateY(6px);
   left:13px;
    color:rgba($white,.5);
    transition:all 0.25s ease;
   -webkit-backface-visibility: hidden;
  pointer-events: none;
 font-size:22px;
.req {
margin:2px;
color:$main;
}
}

label.active {
transform:translateY(50px);
left:2px;
font-size:14px;
.req {
opacity:0;
}
}

  label.highlight {
 color:$white;
 }

input, textarea {
font-size:22px;
display:block;
width:100%;
height:100%;
padding:5px 10px;
background:none;
background-image:none;
border:1px solid $gray-light;
color:$white;
border-radius:0;
transition:border-color .25s ease, box-shadow .25s ease;
&:focus {
    outline:0;
    border-color:$main;
}
}

 textarea {
   border:2px solid $gray-light;
  resize: vertical;
  }

 .field-wrap {
 position:relative;
 margin-bottom:40px;
} 

  .top-row {
  &:after {
  content: "";
   display: table;
  clear: both;
   }

> div {
float:left;
width:48%;
margin-right:4%;
&:last-child { 
  margin:0;
}
}
}

.button {
 border:0;
 outline:none;
 border-radius:0;
 padding:15px 0;
 font-size:2rem;
font-weight:$bold;
text-transform:uppercase;
letter-spacing:.1em;
background:$main;
color:$white;
transition:all.5s ease;
-webkit-appearance: none;
&:hover, &:focus {
background:$main-dark;
  }
 }

 .button-block {
display:block;
width:100%;
}

.forgot {
 margin-top:-20px;
text-align:right;
}

Answer 1

请使用这样的语法

$('form').find('input[type=text],textarea').on(...

JavaScript代码不会影响输出

1 个答案: