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{    arr1.splice(middle,item); }); return arr1;     2.纯css写一个自转的圆形；   @keyframes rotate{     0%{ -webkit-transform:rotate(0deg);}     100%{-webkit-transform:rotate(360deg);} } .wrapper{     animation:rotate 2s linear  infinite; } .wrapper{     width:150px;     height:150px;     background:linear-gradient(135deg,rgba(111,219,68,1) 0%,1) 50%,rgba(3,153,8,1) 100%);     border-radius:50%; } 原文链接：https://www.f2er.com/js/415813.html