react-native-currency-input
v1.1.1
Published
A simple currency input component for both iOS and Android
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A simple currency input component for both iOS and Android.
The goal of react-native-currency-input
is to offer a simple and effective way to handle number inputs with custom format, usually a currency input, but it can be used for any number input case.
- Features
- Installation
- Basic Usage
- Advanced Usage
- Using custom TextInput
- Props
- Example
- FakeCurrencyInput
formatNumber
Features
- A simple and practical component for number inputs
- It's just a
<TextInput/>
component, so you can use its props and it's easy to customize - Handle any number format with these powerful props:
precision
,delimiter
,separator
,prefix
andsuffix
. - It handles negative values and you can choose the position of the sign with the
signPosition
. - Set minimun and maximum values with
minValue
andmaxValue
. - Use React Native ES6 and React Hooks
BONUS
<FakeCurrencyInput />
: A fake input that hides the real TextInput in order to get rid of the flickering issueformatNumber()
: A function that formats number
Installation
npm install react-native-currency-input
or
yarn add react-native-currency-input
Basic Usage
import CurrencyInput from 'react-native-currency-input';
function MyComponent() {
const [value, setValue] = React.useState(2310.458); // can also be null
return <CurrencyInput value={value} onChangeValue={setValue} />;
}
Advanced Usage
import CurrencyInput from 'react-native-currency-input';
function MyComponent() {
const [value, setValue] = React.useState(2310.458);
return (
<CurrencyInput
value={value}
onChangeValue={setValue}
prefix="R$"
delimiter="."
separator=","
precision={2}
minValue={0}
showPositiveSign
onChangeText={(formattedValue) => {
console.log(formattedValue); // R$ +2.310,46
}}
/>
);
}
Using custom TextInput
import CurrencyInput from 'react-native-currency-input';
import { Input } from 'native-base';
function MyComponent() {
const [value, setValue] = React.useState(2310.458);
return (
<CurrencyInput
value={value}
onChangeValue={setValue}
renderTextInput={textInputProps => <Input {...textInputProps} variant='filled' />}
renderText
prefix="R$"
delimiter="."
separator=","
precision={2}
/>
);
}
Props
| Prop | Type | Default | Description |
| ---------------------- | -------- | ------------- | ------------------------------------------------------------------------------------------------------------------------------------------ |
| ...TextInputProps | | | Inherit all props of TextInput
. |
| value
| number | | The value for controlled input. REQUIRED |
| onChangeValue
| function | | Callback that is called when the input's value changes. REQUIRED |
| prefix
| string | | Character to be prefixed on the value. |
| suffix
* | string | | Character to be suffixed on the value. |
| delimiter
| string | , | Character for thousands delimiter. |
| separator
| string | . | Decimal separator character. |
| precision
| number | 2 | Decimal precision. |
| maxValue
| number | | Max value allowed. Might cause unexpected behavior if you pass a value
higher than the one defined here. |
| minValue
| number | | Min value allowed. Might cause unexpected behavior if you pass a value
lower than the one defined here. |
| signPosition
| string | "afterPrefix" | Where the negative/positive sign (+/-) should be placed. |
| showPositiveSign
| boolean | false | Set this to true
to show the +
character on positive values. |
| onChangeText
| function | | Callback that is called when the input's text changes. IMPORTANT: This does not control the input value, you must use onChangeValue
. |
| renderTextInput
| function | | Use a custom TextInput component. |
* IMPORTANT: Be aware that using the suffix
implies setting the selection
property of the TextInput
internally. You can override the selection
, but that will cause behavior problems on the component
Tip: If you don't want negative values, just use minValue={0}
.
Example
See EXAMPLE
git clone https://github.com/caioquirinomedeiros/react-native-currency-input.git
cd react-native-currency-input/example
yarn
yarn android / yarn ios
FakeCurrencyInput
This component hides the TextInput
and use a Text
on its place, so you'll lost the cursor, but will get rid of the flickering issue. To replace the cursor it's used a pipe character (|) that will be always at the end of the text. It also have a wrapper View
with position "relative" on which the TextInput
is stretched over.
- Pros
- No flickering issue as a controlled input component
- The cursor is locked at the end, avoiding the user to mess up with the mask
- Cons
- Lost of selection functionality. The user will still be able to copy/paste, but with a bad experience
- The cursor is locked at the end...
FakeCurrencyInput
Usage
import { FakeCurrencyInput } from 'react-native-currency-input';
function MyComponent() {
const [value, setValue] = React.useState(0); // can also be null
return (
<FakeCurrencyInput
value={value}
onChangeValue={setValue}
prefix="$"
delimiter=","
separator="."
precision={2}
onChangeText={(formattedValue) => {
// ...
}}
/>
);
}
FakeCurrencyInput
Props
It includes the same props of the CurrencyInput with the additional of the following:
| Prop | Type | Default | Description |
| ------------------------- | ---------- | ------- | ------------------------------------------------- |
| ...CurrencuInputProps | | | Inherit all props of CurrencyInput
. |
| containerStyle
| style prop | | Style for the container View that wraps the Text. |
| caretColor
| string | #6495ed | Color of the caret. Same as caretStyle.color. |
| caretStyle
| style prop | | Style for the caret text component. |
formatNumber(value, options)
import { formatNumber } from 'react-native-currency-input';
const value = -2375923.3;
const formattedValue = formatNumber(value, {
separator: ',',
prefix: 'R$ ',
precision: 2,
delimiter: '.',
signPosition: 'beforePrefix',
});
console.log(formattedValue); // -R$ 2.375.923,30
options
(optional)
| Name | Type | Default | Description |
| ---------------------- | ------- | ------------- | ---------------------------------------------------------------- |
| prefix
| string | | Character to be prefixed on the value. |
| suffix
| string | | Character to be suffixed on the value. |
| delimiter
| string | , | Character for thousands delimiter. |
| separator
| string | . | Decimal separator character. |
| precision
| number | 2 | Decimal precision. |
| ignoreNegative
| boolean | false | Set this to true to disable negative values. |
| signPosition
| string | "afterPrefix" | Where the negative/positive sign (+/-) should be placed. |
| showPositiveSign
| boolean | false | Set this to true
to show the +
character on positive values. |
Contributing
See the contributing guide to learn how to contribute to the repository and the development workflow.
License
react-native-currency-input is released under the MIT license. See LICENSE for details.
Any question or support will welcome.