这是一个是点击时波纹涟漪特效的代码,一个圆圈元素从用户点击的位置径向扩散开来。大概原理是在单击“坐标”后面的“父项”与“父项”的链接后面创建一个圆圈元素(隐藏的)。最初是按比例缩小到0%,然后动画到250%,以覆盖整个父元素。随着圆圈的增加,其透明度开始下降。
<h1>Ripple Click Effect</h1> <ul> <li><a>Dashboard</a></li> <li><a>My Account</a></li> <li><a>Direct Messages</a></li> <li><a>Chat Rooms</a></li> <li><a>Settings</a></li> <li><a>Logout</a></li> </ul>
/*custom fonts - Bitter, Montserrat*/ @import url('http://fonts.useso.com/css?family=Montserrat|Bitter'); h1 { font: normal 32px/32px Bitter; color: white; text-align: center; padding: 85px 100px; } /*nav styles*/ ul { background: white; border-top: 6px solid hsl(180, 40%, 60%); width: 200px; margin: 0 auto; } ul li { list-style-type: none; /*relative positioning for list items along with overflow hidden to contain the overflowing ripple*/ position: relative; overflow: hidden; } ul li a { font: normal 14px/28px Montserrat; color: hsl(180, 40%, 40%); display: block; padding: 10px 15px; text-decoration: none; cursor: pointer; /*since the links are dummy without href values*/ /*prevent text selection*/ user-select: none; /*static positioned elements appear behind absolutely positioned siblings(.ink in this case) hence we will make the links relatively positioned to bring them above .ink*/ position: relative; } /*.ink styles - the elements which will create the ripple effect. The size and position of these elements will be set by the JS code. Initially these elements will be scaled down to 0% and later animated to large fading circles on user click.*/ .ink { display: block; position: absolute; background: hsl(180, 40%, 80%); border-radius: 100%; transform: scale(0); } /*animation effect*/ .ink.animate {animation: ripple 0.65s linear;} @keyframes ripple { /*scale the element to 250% to safely cover the entire link and fade it out*/ 100% {opacity: 0; transform: scale(2.5);} }
//jQuery time var parent, ink, d, x, y; $("ul li a").click(function(e) { parent = $(this).parent(); //create .ink element if it doesn't exist if (parent.find(".ink").length == 0) parent.prepend("<span class='ink'></span>"); ink = parent.find(".ink"); //incase of quick double clicks stop the previous animation ink.removeClass("animate"); //set size of .ink if (!ink.height() && !ink.width()) { //use parent's width or height whichever is larger for the diameter to make a circle which can cover the entire element. d = Math.max(parent.outerWidth(), parent.outerHeight()); ink.css({ height: d, width: d }); } //get click coordinates //logic = click coordinates relative to page - parent's position relative to page - half of self height/width to make it controllable from the center; x = e.pageX - parent.offset().left - ink.width() / 2; y = e.pageY - parent.offset().top - ink.height() / 2; //set the position and add class .animate ink.css({ top: y + 'px', left: x + 'px' }).addClass("animate"); })
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