A simple and effective Text Input with mask for ReactNative on iOS, Android, and Web. No fancy stuff, it's basically a JavaScript function that allow you to use custom masks easily.
- Features
- Installation
- Usage
- Props
- Mask
- Example
- formatWithMask
- useMaskedInputProps (for any component integration)
If you are in need of a CURRENCY input in specific check out my other library react-native-currency-input
- Highly customizable masks with the use of
RegExp - Characteres obfuscation!
- It's just a
<TextInput/>component, no fancy/complex stuff - Use React Native ES6, Typescript and React Hooks
- Exports the function that do all the magic:
formatWithMask
npm install react-native-mask-inputor
yarn add react-native-mask-inputimport MaskInput from 'react-native-mask-input';
function MyComponent() {
const [phone, setPhone] = React.useState('');
return (
<MaskInput
value={phone}
onChangeText={(masked, unmasked) => {
setPhone(masked); // you can use the unmasked value as well
// assuming you typed "9" all the way:
console.log(masked); // (99) 99999-9999
console.log(unmasked); // 99999999999
}}
mask={['(', /\d/, /\d/, ')', ' ', /\d/, /\d/, /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/, /\d/]}
/>
);
}| Prop | Type | Default | Description |
|---|---|---|---|
| ...TextInputProps | Inherit all props of TextInput. |
||
value |
number | The value for controlled input. REQUIRED | |
onChangeText |
function | Callback that is called when the input's text changes. differently of the default function, this one receives three arguments: (maskedText, unmaskedText, obfuscatedText) => void REQUIRED |
|
mask |
Mask | An array where each item defines one character of the value. If the item is a string, that string will be used, if it is an RegExp, it will validate the input on it. | |
showObfuscatedValue |
boolean | false | Whether or not to display the obfuscated value on the TextInput. |
placeholderFillCharacter |
string | _ |
Character to be used as the "fill character" on the default placeholder value. |
obfuscationCharacter |
string | * |
Character to be used on the obfuscated characteres. |
maskAutoComplete |
boolean | false | Add next mask characters at the end of the value |
An array where each item defines one character of the value. If the item is a string, that string will be used, if it is an RegExp, it will validate the input on it.
To be clear: All the characters you want to be inputed by the user must be a RegExp in your mask.
If you want a mask for Zip Code, for example, you'd do like this:
const zipCodeMask = [/\d/, /\d/, /\d/, /\d/, /\d/, '-', /\d/, /\d/, /\d/];That's because the RegExp /\d/ accepts any digit character (0-9)
import { formatWithMask } from 'react-native-mask-input'
const { masked, unmasked, obfuscated } = formatWithMask({
text: '71680345',
mask: zipCodeMask,
});
console.log(masked); // "71680-345"
console.log(unmasked); // "71680345"
console.log(obfuscated); // "71680-345"The mask can also be a function that receives the current value and returns the array mask. That's to help you to change the mask dynamically based on the value.
import MaskInput from 'react-native-mask-input'
const CPF_MASK = [/\d/, /\d/, /\d/, ".", /\d/, /\d/, /\d/, ".", /\d/, /\d/, /\d/, "-", /\d/, /\d/]
const CNPJ_MASK = [/\d/, /\d/, ".", /\d/, /\d/, /\d/, ".", /\d/, /\d/, /\d/, "/", /\d/, /\d/, /\d/, "-", /\d/, /\d/]
function MyComponent() {
const [value, setValue] = React.useState('');
return (
<MaskInput
value={value}
onChangeText={setValue}
mask={(text) => {
if (text.replace(/\D+/g, "").length <= 11) {
return CPF_MASK
} else {
return CNPJ_MASK
}
}}
/>
);
}To mark a character as obfuscated, use the RegExp within an array, like this:
const creditCardMask = [/\d/, /\d/, /\d/, /\d/, " " [/\d/], [/\d/], [/\d/], [/\d/], " ", [/\d/], [/\d/], [/\d/], [/\d/], " ", /\d/, /\d/, /\d/, /\d/];
function MyComponent() {
const [creditCard, setCreditCard] = React.useState('');
return (
<MaskInput
value={creditCard}
mask={creditCardMask}
showObfuscatedValue
obfuscationCharacter="#"
onChangeText={(masked, unmasked, obfuscated) => {
setCreditCard(unmasked); // you can use the masked value as well
// assuming you typed "1234123412341234":
console.log(masked); // "1234 1234 1234 1234"
console.log(unmasked); // "1234123412341234"
console.log(obfuscated); // "1234 #### #### 1234"
}}
/>
);
}You need to use the prop showObfuscatedValue in order to show the obfuscated value on the input
in order to perhaps help some of you, some commonly used masks are exported, if it does not fit your use case I hope it'll at least serve as an inspiration:
import MaskInput, { Masks } from 'react-native-mask-input';
function MyComponent() {
const [creditCard, setCreditCard] = React.useState('');
return (
<MaskInput
value={creditCard}
onChangeText={setCreditCard}
mask={Masks.CREDIT_CARD}
/>
);
}| Mask | Use case |
|---|---|
| Masks.BRL_CAR_PLATE | ABC-1234 |
| Masks.BRL_CPNJ | 33.594.232/0001-00 |
| Masks.BRL_CPF | 903.549.000-21 |
| Masks.BRL_CURRENCY | R$ 1.234,56 |
| Masks.BRL_PHONE | (61) 99966-7746 |
| Masks.USA_PHONE | (415) 555-0132 |
| Masks.CREDIT_CARD | 9999 **** **** 9999 |
| Masks.DATE_DDMMYYYY | 12/04/1995 |
| Masks.DATE_MMDDYYYY | 04/12/1995 |
| Masks.DATE_YYYYMMDD | 1995/04/12 |
| Masks.ZIP_CODE | 71680-345 |
This is a helper function to create a number mask, you'd use this on currency input cases for example.
import MaskInput, { createNumberMask } from 'react-native-mask-input';
const dollarMask = createNumberMask({
prefix: ['R', '$', ' '],
delimiter: '.',
separator: ',',
precision: 2,
})
function MyComponent() {
const [value, setValue] = React.useState('');
return (
<MaskInput
value={value}
mask={dollarMask}
onChangeText={(masked, unmasked) => {
setValue(unmasked); // you can use the masked value as well
// assuming you typed "123456":
console.log(masked); // "R$ 1.234,56"
console.log(unmasked); // "123456"
}}
/>
);
}| Name | Type | Default | Description |
|---|---|---|---|
prefix |
Mask | [] | Mask to be prefixed on the mask result. |
delimiter |
string | . |
Character for thousands delimiter. |
separator |
string | , |
Decimal separator character. |
precision |
number | 2 | Decimal precision. |
See EXAMPLE
git clone https://github.com/caioquirinomedeiros/react-native-mask-input.git
cd react-native-mask-input/example
yarn
yarn android / yarn iosimport { formatWithMask, Masks } from 'react-native-mask-input';
const creditCard = '9999999999999999';
const { masked, unmasked, obfuscated } = formatWithMask({
text: creditCard,
mask: Masks.CREDIT_CARD,
obfuscationCharacter: '-',
});
console.log(masked); // 9999 9999 9999 9999
console.log(unmasked); // 9999999999999999
console.log(obfuscated); // 9999 ---- ---- 9999| Name | Type | Default | Description |
|---|---|---|---|
text |
string | Text to be formatted with the mask. | |
mask |
Mask | An array where each item defines one character of the value. If the item is a string, that string will be used, if it is an RegExp, it will validate the input on it. | |
obfuscationCharacter |
string | * |
Character to be used on the obfuscated characteres. |
import { Input } from 'native-base'
import { Masks } from 'react-native-mask-input';
function MyComponent() {
const [phone, setPhone] = React.useState('');
const maskedInputProps = useMaskedInputProps({
value: phone,
onChangeText: setPhone,
mask: Masks.BRL_PHONE,
});
return <Input {...maskedInputProps} />
}See the contributing guide to learn how to contribute to the repository and the development workflow.
react-native-mask-input is released under the MIT license. See LICENSE for details.
Any question or support will welcome.
