2022-03-21
handleOnChangeNumber(e){
const re = /^[0-9\b]+$/;
// if value is not blank, then test the regex
if (e.target.value === '' || re.test(e.target.value)) {
setPhoneNumber(e.target.value)
}
}<input
type="text"
onChange={(e) => handleOnChangeNumber(e)}
value={phoneNumber}
placeholder="81200001111"
pattern="\d*"
/>