Question

所以我正在尝试在html中构建一个滑块（使用jquery）将网站的背景从白色变为黑色（它是黑暗项目构思中的发光）。

我一直在互联网上寻找并为RGB构建了一个工作滑块，但不能让它只是白色到黑色，反之亦然......任何人都知道如何做到这一点？我不希望它成为彩虹的所有颜色只有两个哈哈！

我的代码如下：

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery UI Slider - Colorpicker</title>
  <link rel="stylesheet" href="http://code.jquery.com/ui/1.11.2/themes/smoothness/jquery-ui.css">
  <script src="http://code.jquery.com/jquery-1.10.2.js"></script>
  <script src="http://code.jquery.com/ui/1.11.2/jquery-ui.js"></script>
  <link rel="stylesheet" href="http://jqueryui.com/resources/demos/style.css">
  <style>
  #red, #green, #blue {
    float: left;
    clear: left;
    width: 300px;
    margin: 15px;
  }
  #swatch {
    width: 120px;
    height: 100px;
    margin-top: 18px;
    margin-left: 350px;
    background-image: none;
  }
  #red .ui-slider-range { background: #ef2929; }
  #red .ui-slider-handle { border-color: #ef2929; }
  #green .ui-slider-range { background: #8ae234; }
  #green .ui-slider-handle { border-color: #8ae234; }
  #blue .ui-slider-range { background: #729fcf; }
  #blue .ui-slider-handle { border-color: #729fcf; }
  </style>
  <script>
  function hexFromRGB(r, g, b) {
    var hex = [
      r.toString( 16 ),
      g.toString( 16 ),
      b.toString( 16 )
    ];
    $.each( hex, function( nr, val ) {
      if ( val.length === 1 ) {
        hex[ nr ] = "0" + val;
      }
    });
    return hex.join( "" ).toUpperCase();
  }
  function refreshSwatch() {
    var red = $( "#red" ).slider( "value" ),
      green = $( "#green" ).slider( "value" ),
      blue = $( "#blue" ).slider( "value" ),
      hex = hexFromRGB( red, green, blue );
    $( "#swatch" ).css( "background-color", "#" + hex );
  }
  $(function() {
    $( "#red, #green, #blue" ).slider({
      orientation: "horizontal",
      range: "min",
      max: 255,
      value: 127,
      slide: refreshSwatch,
      change: refreshSwatch
    });
    $( "#red" ).slider( "value", 255 );
    $( "#green" ).slider( "value", 140 );
    $( "#blue" ).slider( "value", 60 );
  });
  </script>
</head>
<body class="ui-widget-content" style="border:0;">

<p class="ui-state-default ui-corner-all ui-helper-clearfix" style="padding:4px;">
  <span class="ui-icon ui-icon-pencil" style="float:left; margin:-2px 5px 0 0;"></span>
  Simple Colorpicker
</p>

<div id="red"></div>
<div id="green"></div>
<div id="blue"></div>

<div id="swatch" class="ui-widget-content ui-corner-all"></div>


</body>
</html>

Answer 1

这是一个简单的方法：

$("#slider").slider({
    min: 0,
    max: 255,
    slide: function (event, ui) {
        val = 255 - ui.value;
        bkgrnd = 'rgb('+val+','+val+','+val+')';
        $('body').css('background-color',bkgrnd)
    }
});

<强> jsFiddle example

白色到黑色改变滑块Html？

1 个答案: