就是不掉下来,而且变颜色,输入东西的时候还在,也就是鼠标移开不掉下来
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关注<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <style> .form-item { position: relative; margin-top: 40px; } .form-item label, .form-item input { position: absolute; height: 32px; line-height: 32px; top: 0; left: 10px; } .form-item label { color: #ccc; transition: all .4s; z-index: 1; } .form-item input { border: none; outline: none; border-bottom: 1px solid #ccc; background: transparent; z-index: 2; } #olabel{ opacity: 0; } .form-item input:focus { border-color: red; } .form-item input:hover + #olabel { opacity: 1 !important; color: red; top: -32px; } .form-item input:focus + #olabel { opacity: 1 !important; color: red; top: -32px; } </style> </head> <body> <div class="form-item"> <input type="text" id="oinput" value=""/> <label for="" id="olabel">请输入账号</label> </div> <script> var input = document.getElementById('oinput') var label = document.getElementById('olabel') if(input.value !== ''){ label.style.opacity = 0 }else{ label.style.opacity = 1 } input.onfocus = function(){ if(input.value !== ''){ label.style.opacity = 0 }else{ label.style.opacity = 1 } } input.onblur = function(){ if(input.value !== ''){ label.style.opacity = 0 }else{ label.style.opacity = 1 } } </script> </body> </html>本回答被题主选为最佳回答 , 对您是否有帮助呢?解决 无用评论 打赏 举报