- html5表单空间的新的属性（autocomplete）：autocomplete = 'new-password'
- 设置为type＝“text”，获取焦点的时候再改为type＝“password” ：onfocus="this.type='password'"
<input type="password" placeholder="请输入密码" autocomplete="new-password" >
<input type="text" placeholder="请输入密码" onfocus="this.type='password'">