Примеры для jQuery .fadeTo()

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Animates first paragraph to fade to an opacity of 0.33 (33%, about one third visible), completing the animation within 600 milliseconds.

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>fadeTo demo</title>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<p>
Click this paragraph to see it fade.
</p>
 
<p>
Compare to this one that won't fade.
</p>
 
<script>
$( "p:first" ).click(function() {
  $( this ).fadeTo( "slow", 0.33 );
});
</script>
 
</body>
</html>

Демонстрация:

Fade div to a random opacity on each click, completing the animation within 200 milliseconds.

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>fadeTo demo</title>
  <style>
  p {
    width: 80px;
    margin: 0;
    padding: 5px;
  }
  div {
    width: 40px;
    height: 40px;
    position: absolute;
  }
  #one {
    top: 0;
    left: 0;
    background: #f00;
  }
  #two {
    top: 20px;
    left: 20px;
    background: #0f0;
  }
  #three {
    top: 40px;
    left:40px;
    background:#00f;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<p>And this is the library that John built...</p>
 
<div id="one"></div>
<div id="two"></div>
<div id="three"></div>
 
<script>
$( "div" ).click(function() {
  $( this ).fadeTo( "fast", Math.random() );
});
</script>
 
</body>
</html>

Демонстрация:

Find the right answer! The fade will take 250 milliseconds and change various styles when it completes.

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>fadeTo demo</title>
  <style>
  div, p {
    width: 80px;
    height: 40px;
    top: 0;
    margin: 0;
    position: absolute;
    padding-top: 8px;
  }
  p {
    background: #fcc;
    text-align: center;
  }
  div {
    background: blue;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<p>Wrong</p>
<div></div>
<p>Wrong</p>
<div></div>
<p>Right!</p>
<div></div>
 
<script>
var getPos = function( n ) {
  return (Math.floor( n ) * 90) + "px";
};
$( "p" ).each(function( n ) {
  var r = Math.floor( Math.random() * 3 );
  var tmp = $( this ).text();
  $( this ).text( $( "p:eq(" + r + ")" ).text() );
  $( "p:eq(" + r + ")" ).text( tmp );
  $( this ).css( "left", getPos( n ) );
});
$( "div" )
  .each(function( n ) {
    $( this ).css( "left", getPos( n ) );
  })
  .css( "cursor", "pointer" )
  .click( function() {
    $( this ).fadeTo( 250, 0.25, function() {
      $( this )
        .css( "cursor", "" )
        .prev()
          .css({
            "font-weight": "bolder",
            "font-style": "italic"
          });
    });
  });
</script>
 
</body>
</html>

Демонстрация: