Javascript Reactjs中document.getElementById().setCustomValidity()的等效值是多少
您好,我的问题是在Reactjs中为我的注册表创建document.getElementById().setCustomValidity()的等效值以验证firstname输入字段 这是我的密码Javascript Reactjs中document.getElementById().setCustomValidity()的等效值是多少,javascript,reactjs,Javascript,Reactjs,您好,我的问题是在Reactjs中为我的注册表创建document.getElementById().setCustomValidity()的等效值以验证firstname输入字段 这是我的密码 function CreateAcc() { const[name,setName] = useState({firstname:''}) const onChangehHandle = e => setName({firstname: e.target.value}) c
function CreateAcc() {
const[name,setName] = useState({firstname:''})
const onChangehHandle = e => setName({firstname: e.target.value})
const onblr = () =>{
if(name.firstname==''){
//here i just want to change the alert to document.getElementById().setCustomValidity() to
validate the firstname input field
alert('Please fill out this input field')
}
}
return (
<div>
<form id='createAccForm'>
<h2>Create Account</h2>
<div className='text-box'>
<label><FaUserCircle size='20px'/></label>
<input className='createAccInputInline' id = 'firstname' type='name' name = 'firstname' placeholder='First Name' onBlur={onblr} value ={name.firstname} onChange={onChangehHandle}/>
<input className='createAccInputInline' type='name' name = 'lastname' placeholder='Last Name' />
</div>
<div className='text-box'>
<label htmlFor = 'email'><MdEmail size='20px'/></label>
<input id = 'email' type='email' placeholder='Email Address'/>
</div>
<div className='text-box'>
<label><BsFillLockFill size='20px'/></label>
<input className='createAccInputInline' type='password' placeholder='Password'/>
<input className='createAccInputInline' type='password' placeholder='Confirm Password'/>
</div>
<button id = 'createAccButton'>Sign Up</button>
</form>
</div>
)
}
export default CreateAcc
函数CreateAcc(){
const[name,setName]=useState({firstname:'})
const onChangehHandle=e=>setName({firstname:e.target.value})
const onblr=()=>{
如果(name.firstname==“”){
//这里我只想将警报更改为document.getElementById().setCustomValidity()为
验证firstname输入字段
警报('请填写此输入字段')
}
}
返回(
创建帐户
注册
)
}
导出默认CreateAcc
setCustomValidity
将选择元素的自定义有效性消息设置为指定的消息-但是您的问题似乎想要读取该值?还是我理解错了?你需要使用REF,然后在坐骑上设置自定义validy。。然后在模糊选项中,你可以触发红色的有效性检查。。。第二种选择是控制组件。。。