本文就是给大家分享一下如何使用CSS3实现粒子动画效果。 小编觉得很实用,所以分享给大家学习一下。 希望您读完本文后有所收获。 话不多说,跟着我们上去看看吧。
按钮点击粒子动画
确认
因为按钮是矩形的,前面的代码已经在按钮选择器中添加了一个伪类来实现矩形,所以我们只能再添加一层元素(按钮文本)来实现粒子。
.button-text { position: relative; width: 100%; border-radius: 4px; border: none; cursor: pointer; } .button-text:before, .button-text:after { position: absolute; content: ''; display: block; width: 140%; height: 100%; left: -20%; z-index: -1000; background-repeat: no-repeat; } .button-text:before { display: none; top: -75%; background-image: radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, transparent 20%, #fff 20%, transparent 30%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, transparent 10%, #fff 15%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%); background-size: 10% 10%, 20% 20%, 15% 15%, 20% 20%, 18% 18%, 10% 10%, 15% 15%, 10% 10%, 18% 18%; } .button-text:after { display: none; bottom: -75%; background-image: radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, transparent 10%, #fff 15%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%); background-size: 15% 15%, 20% 20%, 18% 18%, 20% 20%, 15% 15%, 10% 10%, 20% 20%; } .button-text:active { transform: scale(0.9); }
在button-text的伪类元素前面添加background-image,并使用radial-gradient绘制多个圆圈作为粒子。
transform:scale(0.9),是在点击键盘时缩放按钮文本元素。
大家应该都听说过默认的伪元素是display:none; 隐。 所以当我们点击的时候css3 粒子效果,我们需要添加一个选择器来显示它并执行动画。
我使用 Node.js 来监听点击css3 粒子效果,并在点击后添加动画选择器。
var animateButton = function(e) { e.preventDefault; e.target.classList.remove('animate'); e.target.classList.add('animate'); setTimeout(function(){ e.target.classList.remove('animate'); },700); }; var classname = document.getElementsByClassName("button-text"); for (var i = 0; i < classname.length; i++) { classname[i].addEventListener('click', animateButton, false); }
之后我们添加 CSS 并开始动画
.button-text.animate:before { display: block; animation: topBubbles ease-in-out 0.75s forwards; } .button-text.animate:after { display: block; animation: bottomBubbles ease-in-out 0.75s forwards; } @keyframes topBubbles { 0% { background-position: 5% 90%, 10% 90%, 10% 90%, 15% 90%, 25% 90%, 25% 90%, 40% 90%, 55% 90%, 70% 90%; } 50% { background-position: 0% 80%, 0% 20%, 10% 40%, 20% 0%, 30% 30%, 22% 50%, 50% 50%, 65% 20%, 90% 30%; } 100% { background-position: 0% 70%, 0% 10%, 10% 30%, 20% -10%, 30% 20%, 22% 40%, 50% 40%, 65% 10%, 90% 20%; background-size: 0% 0%, 0% 0%, 0% 0%, 0% 0%, 0% 0%, 0% 0%; } } @keyframes bottomBubbles { 0% { background-position: 10% -10%, 30% 10%, 55% -10%, 70% -10%, 85% -10%, 70% -10%, 70% 0%; } 50% { background-position: 0% 80%, 20% 80%, 45% 60%, 60% 100%, 75% 70%, 95% 60%, 105% 0%; } 100% { background-position: 0% 90%, 20% 90%, 45% 70%, 60% 110%, 75% 80%, 95% 70%, 110% 10%; background-size: 0% 0%, 0% 0%, 0% 0%, 0% 0%, 0% 0%, 0% 0%; } }
我们使用background-position来改变背景的位置,使用background-size来改变大小来产生动画效果。
这会产生按钮单击粒子动画的效果。
同样的方法,我们可以给背景添加同样的粒子效果。 代码基本可以复制。
背景粒子效果
.king:before { position: absolute; content: ''; display: block; width: 100%; height: 100%; top: 0; z-index: 1; background-repeat: no-repeat; opacity: 0.4; } .king:before { background-image: radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, transparent 20%, #fff 20%, transparent 30%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, transparent 10%, #fff 15%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%), radial-gradient(circle, #fff 20%, transparent 20%); background-size: 10% 10%, 12% 12%, 5% 5%, 12% 12%, 5% 5%, 10% 10%, 5% 5%, 10% 10%, 5% 5%; display: block; animation: topBubbles ease-in-out 3s forwards infinite; }
以上就是如何使用CSS3实现粒子动画效果。 相信有些知识点在我们日常工作中可能会看到或者用到。 希望您能通过本文学到更多的知识。 更多详情请关注易速云行业资讯频道。
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