本文介绍了jquery更改不透明度和滚动上的高度的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 我目前正在尝试写一个小js。我的导航设置为背景的渐变。 当我向下滚动一定量时,我想让背景从高度变化,从渐变变为平坦的颜色,不透明度为0.85(动画)。 我的js代码 $(window).scroll(function(){ if($(window).scrollTop ()> = 600){ $('#navigation')。css({height:'92px'}); } else { $('#navigation')。 css({height:'142px'}); } }); 这里是css #navigation { height:142px; width:1350px; position:fixed; z-index:2000; background:-moz-linear-gradient(top,rgba(0,0,0,0.75)0%,rgba(0,0,0,0)100%); / * FF3.6 + * / background:-webkit-gradient(linear,left top,left bottom,color-stop(0%,rgba(0,0,0,0.75)),color-stop 100%,rgba(0,0,0,0))); / * Chrome,Safari4 + * / background:-webkit-linear-gradient(top,rgba(0,0,0,0.75)0%,rgba(0,0,0,0)100% / * Chrome10 +,Safari5.1 + * / background:-o-linear-gradient(top,rgba(0,0,0,0.75)0%,rgba(0,0,0,0)100% ); / * Opera 11.10+ * / background:-ms-linear-gradient(top,rgba(0,0,0,0.75)0%,rgba(0,0,0,0)100%); / * IE10 + * / background:linear-gradient(to bottom,rgba(0,0,0,0.75)0%,rgba(0,0,0,0)100%); / * W3C * / filter:progid:DXImageTransform.Microsoft.gradient(startColorstr ='#bf000000',endColorstr ='#00000000',GradientType = 0); / * IE6-9 * / } 希望有人可以帮助我解决方案您的代码很好! 只需创建两个单独的类,并用替换 $('#navigation')。css({height:'92px'}); $('#navigation')。addClass(flatColored); 和 $('#navigation')。在你的css中使用 #navigation {...} ,而不是在你的css中使用 .gradientColored {...} .flatcolored {...} $ c>< div id =navigationclass =gradientColored> ...< / div> background 属性。 根据您的代码在Chrome上测试。工作正常! I'm currently trying to write a little js. My navigation has a gradient set as background.I want the background to change in height and from a gradient to a flat color with 0.85 opacity (animated) when I scroll down a certain amount.here's my js code$(window).scroll(function(){if ($(window).scrollTop() >= 600){ $('#navigation').css({height: '92px'});} else { $('#navigation').css({height: '142px'}); }}); here's the css#navigation {height: 142px;width: 1350px;position: fixed;z-index: 2000;background: -moz-linear-gradient(top, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0) 100%); /* FF3.6+ */background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(0,0,0,0.75)), color-stop(100%,rgba(0,0,0,0))); /* Chrome,Safari4+ */background: -webkit-linear-gradient(top, rgba(0,0,0,0.75) 0%,rgba(0,0,0,0) 100%); /* Chrome10+,Safari5.1+ */background: -o-linear-gradient(top, rgba(0,0,0,0.75) 0%,rgba(0,0,0,0) 100%); /* Opera 11.10+ */background: -ms-linear-gradient(top, rgba(0,0,0,0.75) 0%,rgba(0,0,0,0) 100%); /* IE10+ */background: linear-gradient(to bottom, rgba(0,0,0,0.75) 0%,rgba(0,0,0,0) 100%); /* W3C */filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#bf000000', endColorstr='#00000000',GradientType=0 ); /* IE6-9 */}hope someone can help me 解决方案 Your code is good !!Just create two separate class and replace your $('#navigation').css({height: '92px'}); by $('#navigation').addClass("flatColored"); and $('#navigation').removeClass("flatColored"); in the 'else'.instead of having #navigation{ ...} in your css, use .gradientColored{...} .flatcolored{...}and in your html : <div id="navigation" class="gradientColored">...</div>Override the background properties in the 'flatColored class. Tested on chrome, based on your code. Works fine ! 这篇关于jquery更改不透明度和滚动上的高度的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!
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