9. 弹出键盘挡住input
1.) react 中
<input className="inp3" placeholder="密码" type="password" onChange={this.changepassword.bind(this)} onFocus={this.FocusFN.bind(this)} value={this.state.paswword}/>
FocusFN(){
setTimeout(()=>{
let pannel = document.querySelector('.inp3');
pannel.scrollIntoView(true);
},200)
}