css和js特效

在网页开发中，CSS（层叠样式表）和JavaScript是两种常用的技术，它们各自具有独特的特效功能，以下是对CSS和JS特效的详细阐述：

一、CSS特效

1、文字特效

文字立体阴影：通过text-shadow属性实现，如`text-shadow: 0px 0px 0 #992400, 0px 1px 0 #992400, 1px 1px 0 #992400, 2px 1px 0 #992400, 3px 1px 0 #992400, 4px 1px 0 #992400, 5px 1px 0 #992400, 6px 1px 0 #992400, 7px 1px 0 #992400, 8px 1px 0 #992400, 9px 1px 0 #992400, 10px 1px 0 #992400, 11px 1px 0 #992400, 12px 1px 0 #992400, 13px 1px 0 #992400, 14px 1px 0 #992400, 15px 1px 0 #992400, 16px 1px 0 #992400, 17px 1px 0 #992400, 18px 1px 0 #992400, 19px 1px 0 #992400, 20px 1px 0 #992400, 21px 1px 0 #992400, 22px 1px 0 #992400, 23px 1px 0 #992400, 24px 1px 0 #992400, 25px 1px 0 #992400, 26px 1px 0 #992400, 27px 1px 0 #992400, 28px 1px 0 #992400, 29px 1px 0 #992400, 30px 1px 0 #992400, 31px 1px 0 #992400, 32px 1px 0 #992400, 33px 1px 0 #992400, 34px 1px 0 #992400, 35px 1px 0 #992400, 36px 1px 0 #992400, 37px 1px 0 #992400, 38px 1px 0 #992400, 39px 1px 0 #992400, 40px 1px 0 #992400, 41px 1px 0 #992400, 42px 1px 0 #992400, 43px 1px 0 #992400, 44px 1px 0 #992400, 45px 1px 0 #992400, 46px 1px 0 #992400, 47px 1px 0 #992400, 48px 1px 0 #992400, 49px 1px 0 #992400, 50px 1px 0 #992400, 51px 1px 0 #992400, 52px 1px 0 #992400, 53px 1px 0 #992400, 54px 1px 0 #992400, 55px 1px 0 #992400, 56px 1px 0 #992400, 57px 1px 0 #992400, 58px 1px 0 #992400, 59px 1px 0 #992400, 60px 1px 0 #992400, 61px 1px 0 #992400, 62px 1px 0 #992400, 63px 1px 0 #992400, 64px 1px 0 #992400, 65px 1px 0 #992400, 66px 1px 0 #992400, 67px 1px 0 #992400, 68px 1px 0 #992400, 69px 1px 0 #992400, 70px 1px 0 #992400, 71px 1px 0 #992400, 72px 1px 0 #992400, 73px 1px 0 #992400, 74px 1px 0 #992400, 75px 1px 0 #992400, 76px 1px 0 #992400, 77px 1px 0 #992400, 78px 1px 0 #992400, 79px 1px 0 #992400, 80px 1px 0 #992400, 81px 1px 0 #992400, 82px 1px 0 #992400, 83px 1px 0 #992400, 84px 1px 0 #992400, 85px 1px 0 #992400, 86px 1px 0 #992400, 87px 1px 0 #992400, 88px 1px 0 #992400, 89px 1px 0 #992400, 90px 1px 0 #992400, 91px 1px 0 #992400, 92px 1px 0 #992400, 93px 1px 0 #992400, 94px 1px 0 #992400, 95px 1px 0 #992400, 96px 1px 0 #992400, 97px 1px 0 #992400, 98px 1px 0 #992400, 99px 1px 0 #992400, 100px 1px 0 #992400。

文字跳动效果：利用@keyframes定义动画，再通过animation属性应用到文字上，如@keyframes bounce { from { transform: translateY(0); } to { transform: translateY(-20px); } } .text { animation: bounce 1s infinite; }。

文字颜色渐变流光效果：使用background-image结合-webkit-text-fill-color等属性实现，如h1 { background: -webkit-linear-gradient(135deg, #0eaf6d, #ff6ac6 25%, #147b96 50%, #e6d205 55%, #2cc4e0 60%, #8b2ce0 80%, #ff6384 95%, #08dfb4); -webkit-text-fill-color: transparent; -webkit-background-clip: text; font-size: 3em; line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height: line-height; }。

文字描边效果：通过text-shadow属性设置多个阴影来实现，如`text-shadow: -1px -1px 0 #000, -2px -2px 0 #fff, -3px -3px 1.5pt rgba(255,255,255,.5), -4px -4px -.5pt rgba(255,255,255,.3), -5px -5px -.5pt rgba(255,255,255,.3), -6px -6px -.5pt rgba(255,255,255,.3), -7px -7px -.5pt rgba(255,255,255,.3), -8px -8px -.5pt rgba(255,255,255,.3), -9px -9px -.5pt rgba(255,255,255,.3), -10px -10px -.5pt rgba(255,255,255,.3), -11px -11px -.5pt rgba(255,255,255,.3), -12px -12px -.5pt rgba(255,255,255,.3), -13px -13px -.5pt rgba(255,255,255,.3), -14px -14px -.5pt rgba(255,255,255,.3), -15px -15px -.5pt rgba(255,255,255,.3), -16px -16px -.5pt rgba(255,255,255,.3), -17px -17px -.5pt rgba(255,255,255,.3), -18px -18px -.5pt rgba(255,255,255,.3), -19px -19px -.5pt rgba(255,255,255,.3), -20px -20px -.5pt rgba(255,255,255,.3), -21px -21px -.5pt rgba(255,255,255,.3), -22px -22px -.5pt rgba(255,255,255,.3), -23px -23px -.5pt rgba(255,255,255,.3), -24px -24px -.5pt rgba(255,256,256,.3), -25px -25px -.5pt rgba(256,256,256,.3), -26px -26px -.5pt rgba(256,256,256,.3), -27px -.5pt rgba(256,256,256,.3), -28px -.5pt rgba(256,256,256,.3), -29px -.5pt rgba(256,256,256,.3), -30px -.5pt rgba(256,256,256,.3), -31px -.5pt rgba(256,256,256,.3), -32px -.5pt rgba(256,256,256,.3), -33px -.5pt rgba(256,256,256,.3), -34px -.5pt rgba(256,256,256,.3), -35px -.5pt rgba(256,256,256,.3), -36px -.5pt rgba(256,256,256,.3), -37px -.5pt rgba(256,256,256,.3), -38px -.5pt rgba(256,256,256,.3), -39px -.5pt rgba(256,256,256,.3), -40px -.5pt rgba(256,256,256,.3), -41px -.5pt rgba(256,256,256,.3), -42px -.5pt rgba(256)