[css3]搜索框focus时变长时间:2023-03-09 16:18:00 结构: <form class="demo-a"> <input placeholder="Search" type="search"></form> 关键样式: .demo-a input{width: 15px; border-radius: 10em; transition: all 0.5s ease 0s;} .demo-a input:focus{width: 130px; box-shadow: 0 0 5px rgba(109,207,246,.5);}