react-number-format
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    4.6.4 • Public • Published

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    react-number-format

    React component to format number in an input or as a text

    Features

    1. Prefix, suffix and thousand separator.
    2. Custom format pattern.
    3. Masking.
    4. Custom formatting handler.
    5. Format number in an input or format as a simple text.

    Install

    npm

    Through npm npm install react-number-format --save

    Or get compiled development and production version from ./dist

    Usage

    ES6

    import NumberFormat from 'react-number-format';

    ES5

    const NumberFormat = require('react-number-format');

    Typescript

    import NumberFormat from 'react-number-format';
    //or
    import { default as NumberFormat } from 'react-number-format';

    In typescript you also have to enable "esModuleInterop": true in your tsconfig.json (https://www.typescriptlang.org/docs/handbook/compiler-options.html).

    Props

    Props Options Default Description
    thousandSeparator mixed: single character string or boolean true (true is default to ,) none Add thousand separators on number
    decimalSeparator single character string . Support decimal point on a number
    thousandsGroupStyle One of ['thousand', 'lakh', 'wan'] thousand Define the thousand grouping style, It support three types. thousand style (thousand) : 123,456,789, indian style (lakh) : 12,34,56,789, chinese style (wan) : 1,2345,6789
    decimalScale number none If defined it limits to given decimal scale
    fixedDecimalScale boolean false If true it add 0s to match given decimalScale
    allowNegative boolean true allow negative numbers (Only when format option is not provided)
    allowEmptyFormatting boolean false Apply formatting to empty inputs
    allowLeadingZeros boolean false Allow leading zeros at beginning of number
    prefix String (ex : $) none Add a prefix before the number
    suffix String (ex : /-) none Add a suffix after the number
    value Number or String null Value to the number format. It can be a float number, or formatted string. If value is string representation of number (unformatted), isNumericString props should be passed as true.
    defaultValue Number or String null Value to be used as default value if value is not provided. The format of defaultValue should be similar as defined for the value.
    isNumericString boolean false If value is passed as string representation of numbers (unformatted) then this should be passed as true
    displayType String: text / input input If input it renders a input element where formatting happens as you input characters. If text it renders it as a normal text in a span formatting the given value
    type One of ['text', 'tel', 'password'] text Input type attribute
    format String : Hash based ex (#### #### #### ####)
    Or Function
    none If format given as hash string allow number input inplace of hash. If format given as function, component calls the function with unformatted number and expects formatted number.
    removeFormatting (formattedValue) => numericString none If you are providing custom format method and it add numbers as format you will need to add custom removeFormatting logic
    mask String (ex : _) ' ' If mask defined, component will show non entered placed with masked value.
    customInput Component Reference input This allow supporting custom inputs with number format.
    onValueChange (values) => {} none onValueChange handler accepts values object
    isAllowed (values) => true or false none A checker function to check if input value is valid or not. If this function returns false, the onChange method will not get triggered
    renderText (formattedValue, customProps) => React Element null A renderText method useful if you want to render formattedValue in different element other than span. It also returns the custom props that are added to the component which can allow passing down props to the rendered element
    getInputRef (elm) => void null Method to get reference of input, span (based on displayType prop) or the customInput's reference. See Getting reference
    allowedDecimalSeparators array of char none Characters which when pressed result in a decimal separator. When missing, decimal separator and '.' are used

    Other than this it accepts all the props which can be given to a input or span based on displayType you selected.

    values object

    values object is on following format

    {
      formattedValue: '$23,234,235.56', //value after applying formatting
      value: '23234235.56', //non formatted value as numeric string 23234235.56, if you are setting this value to state make sure to pass isNumericString prop to true
      floatValue: 23234235.56 //floating point representation. For big numbers it can have exponential syntax
    }

    Its recommended to use formattedValue / value / floatValue based on the initial state (it should be same as the initial state format) which you are passing as value prop. If you are saving the value key on state make sure to pass isNumericString prop to true.

    Notes and quirks

    1. Value can be passed as string or number, but if it is passed as string it should be either formatted value or if it is a numeric string, you have to set isNumericString props to true.

    2. Value as prop will be rounded to given decimal scale if format option is not provided.

    3. If you want to block floating number set decimalScale to 0.

    4. Use type as tel when you are providing format prop. This will change the mobile keyboard layout to have only numbers. In other case use type as text, so user can type decimal separator.

    5. onChange no longer gets values object. You need to use onValueChange instead. onChange/onFocus/onBlur and other input events will be directly passed to the input.

    6. Its recommended to use formattedValue / value / floatValue based on the initial state (it should be same as the initial state format) which you are passing as value prop. If you are saving the value key on state make sure to pass isNumericString prop to true.

    7. onValueChange is not same as onChange. It gets called on whenever there is change in value which can be caused by any event like change or blur event or by a prop change. It no longer receives event object as second parameter.

    Examples

    Prefix and thousand separator : Format currency as text

    var NumberFormat = require('react-number-format');
    
    <NumberFormat value={2456981} displayType={'text'} thousandSeparator={true} prefix={'$'} />

    Output : $2,456,981

    Custom renderText method

    var NumberFormat = require('react-number-format');
    
    <NumberFormat value={2456981} className="foo" displayType={'text'} thousandSeparator={true} prefix={'$'} renderText={(value, props) => <div {...props}>{value}</div>} />

    Output : <div class="foo"> $2,456,981 </div>

    Format with pattern : Format credit card as text

    <NumberFormat value={4111111111111111} displayType={'text'} format="#### #### #### ####" />

    Output : 4111 1111 1111 1111

    Prefix and thousand separator : Format currency in input

    <NumberFormat thousandSeparator={true} prefix={'$'} />

    Screencast example

    Indian(lakh) style and chinese(wan) style number grouping

    Indian (lakh) style grouping

    <NumberFormat thousandSeparator={true} thousandsGroupStyle="lakh" prefix={'₹'} value={123456789}/>

    Output: ₹12,34,56,789

    Chinese (wan) style grouping

    <NumberFormat thousandSeparator={true} thousandsGroupStyle="wan" prefix={'¥'} value={123456789}/>

    Output: ¥1,2345,6789

    Maintaining change value on state

    <NumberFormat value={this.state.profit} thousandSeparator={true} prefix={'$'} onValueChange={(values) => {
        const {formattedValue, value} = values;
        // formattedValue = $2,223
        // value ie, 2223
        this.setState({profit: formattedValue})
      }}/>

    Format with pattern : Format credit card in an input

    <NumberFormat format="#### #### #### ####" />

    Screencast example

    Format with mask : Format credit card in an input

    <NumberFormat format="#### #### #### ####" mask="_"/>

    Screencast example

    Format with mask as array

    Mask can also be a array of string. Each item corresponds to the same index #.

    <NumberFormat format="##/##" placeholder="MM/YY" mask={['M', 'M', 'Y', 'Y']}/>

    Screencast example

    Custom format method : Format credit card expiry time

    function limit(val, max) {
      if (val.length === 1 && val[0] > max[0]) {
        val = '0' + val;
      }
    
      if (val.length === 2) {
        if (Number(val) === 0) {
          val = '01';
    
        //this can happen when user paste number
      } else if (val > max) {
          val = max;
        }
      }
    
      return val;
    }
    
    function cardExpiry(val) {
      let month = limit(val.substring(0, 2), '12');
      let year = val.substring(2, 4);
    
      return month + (year.length ? '/' + year : '');
    }
    
    <NumberFormat format={cardExpiry}/>

    Screencast example

    Format phone number

    <NumberFormat format="+1 (###) ###-####" mask="_"/>

    Screencast example

    Limit input value to a maximum limit

      const MAX_VAL = 1400;
      const withValueLimit = ({ floatValue }) => floatValue <= MAX_VAL;
      <NumberFormat value={12} isAllowed={withValueLimit} />;

    It is sensible to use floatValue in the withValueLimit check because it provides the exact value (see values object). value is rounded to your configured decimalScale; hence it may omit a part of the precision of the actual value. Given an entered value of 1400.4 and the default decimalScale, value would be transferred as 1400 in the values object and pass the above withValueLimit check. In this case, it is a false positive that can be prevented using floatValue. However, you might want to use value to automatically get the rounded number according to your decimalScale.

    Visit this link for Demo: Field with value limit

    Screencast example

    Show mask on empty input

    <NumberFormat format="+1 (###) ###-####" allowEmptyFormatting mask="_"/>

    Screencast example

    Custom Inputs

    You can easily extend your custom input with number format. But custom input should have all input props.

      import TextField from 'material-ui/TextField';
      <NumberFormat customInput={TextField} format="#### #### #### ####"/>

    Screencast example

    Passing custom input props All custom input props and number input props are passed together.

      <NumberFormat hintText="Some placeholder" value={this.state.card} customInput={TextField} format="#### #### #### ####"/>

    Getting reference

    As ref is a special property in react, its not passed as props. If you add ref property it will give you the reference of NumberFormat instance. In case you need input reference. You can use getInputRef prop instead.

      <NumberFormat getInputRef = {(el) => this.inputElem = el} customInput={TextField} format="#### #### #### ####"/>

    Or using React.createRef()

      const inputRef = React.createRef();
      <NumberFormat getInputRef = {inputRef} customInput={TextField} format="#### #### #### ####"/>

    In case you have provided custom input you can pass there props to get the input reference (getInputRef will not work in that case). For ex in material-ui component.

      <NumberFormat inputRef = {(el) => this.inputElem = el} customInput={TextField} format="#### #### #### ####"/>

    If you can't get in both way you can try ReactDOM.findDOMNode. You may need to traverse if input is not the top level element.

      <NumberFormat ref = {(inst) => this.inputElem = ReactDOM.findDOMNode(inst)} format="#### #### #### ####"/>

    Live Demo

    http://codepen.io/s-yadav/pen/bpKNMa

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    Updates

    For regular updates follow me on _syadav

    Major updates

    v4.0.0

    Breaking Changes

    • onValueChange no longer receives event object as second parameter, so if you accessing it, it will break.

    Feature Addition

    • Support defaultValue prop.
    • Trigger onValueChange if the value is formatted due to prop change.
    • Allow password as type prop.
    • Support indian (lakh) and chinese (wan) style thousand grouping.
    • Always allow . to be typed as decimal separator, even when decimal separator is defined differently

    v3.0.0

    • onChange no longer gets values object. You need to use onValueChange instead. This is done because formatted value may change on onBlur event. calling onChange on onBlur doesn't feel right.
    • decimalPrecision is changed to decimalScale. Precision is the number of digits in a number. Scale is the number of digits to the right of the decimal point in a number.
    • decimalScale by default will not add 0s to match provided decimalScale value like decimalPrecision. You have to set fixedDecimalScale to true.
    • mask can be now array of string in which case mask at specific index will be mapped with the # of the pattern.
    • Value can be passed as string or number, but if it is passed as string it should be either formatted value or if it is a numeric string, you have to set isNumericString props to true.
    • Added support for numbers in prefix / suffix / pattern.
    • Fixed caret position and formatting issues.
    • Lot of bugs and stability fixes (See release notes)

    v2.0.0

    • Added isAllowed prop to validate custom input and reject input based on it.
    • onChange api been changed. Now it receives values object as second parameter.
    • decimalSeparator no longer support boolean values
    • thousandSeparator accepts only true as boolean (which defaults to ,) or thousandSeparator string
    • decimalPrecision only accepts number now
    • Value can be passed as string or number but if it is passed as string you should maintain the same decimal separator on the string what you provided as decimalSeparator prop.
    • Added back the type prop for the input type attribute (Only text or tel is supported)
    • Enforce cursor to be between prefix and suffix in focus, click or arrow navigation.
    • Lot of bugs and stability fixes (See release notes)

    Development

    • Clone the repository or download the zip
    • npm i -g yarn to download Yarn
    • yarn to install dependencies
    • yarn start to run example server (http://localhost:8084/)
    • yarn test to test changes
    • yarn bundle to bundle files

    Testing

    Test cases are written in jasmine and run by karma Test file : /test/test_input.js To run test : yarn test

    Install

    npm i react-number-format

    DownloadsWeekly Downloads

    376,388

    Version

    4.6.4

    License

    MIT

    Unpacked Size

    254 kB

    Total Files

    33

    Last publish

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