<html><head> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> <title>Image preview example</title> </head> <body> <div style="position: relative;width: 200px;"> <input name="password" autocomplete="off" hidden id="password"> <input type="password" autocomplete="off" class="pad-input" style="height: 30px;width: 100%;"> <input placeholder="请输入密码" id="show" type="text" style="position: absolute;left: 3px;top:50%;transform: translate(0,-50%);border: none;height: 28px;pointer-events: none;background: #fff;width: 98%;" disabled> </div> <script> var obj = {}; Object.defineProperty(obj, 'txt', { get: function () { return obj; }, set: function (newValue) { document.getElementsByClassName("pad-input")[0].value = newValue; document.getElementById('show').value = newValue; document.getElementById('password').value = newValue; } }); document.getElementsByClassName("pad-input")[0].addEventListener('keyup', function (e) { obj.txt = e.target.value; }); </script> </body>