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I’m trying to make a Textinput mask using regex, and it’s kind of like this:
But as is remarkable, first the number appears on the screen and then the state is updated and the screen changes again.
Code:
const MoneyTextInput = ({onChangeText, ok}) => {
let [text, setText] = useState('00,00');
return (
<TextInput
value={text}
keyboardType="number-pad"
style={{
width: '100%',
height: '100%',
fontSize: 22,
}}
onChange={({nativeEvent}) => {
setText(prettifyCurrency(nativeEvent.text));
onChangeText(prettifyCurrency(nativeEvent.text));
}}
/>
);
};
The function to format:
function prettifyCurrency(value: String): String {
if (!value) {
return '00,00';
}
let newText = value.replace(/(\D)/g, '').replace(/^0+/, '');
if (newText.length < 4) {
for (let i = newText.length; i < 4; i++) {
newText = '0' + newText;
}
}
newText = newText
.replace(/(\d{2}$)/g, ',$&')
.replace(/(\d{1})(\d{3})([,])/, '$1.$2$3')
.replace(/(\d{1})(\d{3})([.])/, '$1.$2$3')
.replace(/(\d{1})(\d{3})([.])/, '$1.$2$3');
return newText;
}
Is there any way to make Textinput wait value
be updated before displaying any user information?
I know the regex isn’t great but it’s because I’m a beginner in it.
PS.: I am using OnChange
because it seemed a little faster than the onChangeText
Does using preventdefault in keydown, it does not prevent the text from being written before?
– LittleFish
I searched in the documentation and I think there is no way to do this, formerly had to increase the buffer, but already removed this
– Gabriel Amorim