Javascript Thousand Separator / string format

user_422864 0
Viewed 286193

Is there any function in Javascript for formatting number and strings ?

I am looking for a way for thousand separator for string or numbers... (Like String.Format In c#)

numbers format javascript string
15 Answers

If is about localizing thousands separators, delimiters and decimal separators, go with the following:

// --> numObj.toLocaleString( [locales [, options] ] )
parseInt( number ).toLocaleString();

There are several options you can use (and even locales with fallbacks):

number = 123456.7089;

result  = parseInt( number ).toLocaleString() + "<br>";
result += number.toLocaleString( 'de-DE' ) + "<br>";
result += number.toLocaleString( 'ar-EG' ) + "<br>";
result += number.toLocaleString( 'ja-JP', { 
  style           : 'currency',
  currency        : 'JPY',
  currencyDisplay : 'symbol',
  useGrouping     : true
} ) + "<br>";
result += number.toLocaleString( [ 'jav', 'en' ], { 
  localeMatcher            : 'lookup',
  style                    : 'decimal',
  minimumIntegerDigits     : 2,
  minimumFractionDigits    : 2,
  maximumFractionDigits    : 3,
  minimumSignificantDigits : 2,
  maximumSignificantDigits : 3
} ) + "<br>";

var el = document.getElementById( 'result' );
el.innerHTML = result;
<div id="result"></div>

Details on the MDN info page.

Edit: Commentor @I like Serena adds the following:

To support browsers with a non-English locale where we still want English formatting, use value.toLocaleString('en'). Also works for floating point.

user_3764830
user_22442930 
number = 123456.7089;
result = parseInt( number ).toLocaleString() + "<br>";
result = number.toLocaleString( 'pt-BR' ) + "<br>";

var el = document.getElementById( 'result' );
el.innerHTML = result;

<div id="result"></div>
user_82793640

You can use the following function:

function format(number, decimals = 2, decimalSeparator = '.', thousandsSeparator = ',') {
  const roundedNumber = number.toFixed(decimals);
  let integerPart = '',
    fractionalPart = '';
  if (decimals == 0) {
    integerPart = roundedNumber;
    decimalSeparator = '';
  } else {
    let numberParts = roundedNumber.split('.');
    integerPart = numberParts[0];
    fractionalPart = numberParts[1];
  }
  integerPart = integerPart.replace(/(\d)(?=(\d{3})+(?!\d))/g, `$1${thousandsSeparator}`);
  return `${integerPart}${decimalSeparator}${fractionalPart}`;
}

// Use Example

let min = 1556454.0001;
let max = 15556982.9999;

console.time('number format');
for (let i = 0; i < 15; i++) {
  let randomNumber = Math.random() * (max - min) + min;
  let formated = format(randomNumber, 4, ',', '.'); // formated number

  console.log('number: ', randomNumber, '; formated: ', formated);
}
console.timeEnd('number format');

user_106695070

Combination of solutions for react

  let converter = Intl.NumberFormat();
  let salary =  monthlySalary.replace(/,/g,'')
  console.log(converter.format(salary))

  this.setState({
    monthlySalary: converter.format(salary)
  })
}

handleOnChangeMonthlySalary(1000)```
user_103556680

You can use ngx-format-field. It is a directive to format the input value which will appear in the view. It will not manipulate the Input value which will be saved in the backend. See link here!

Example:

component.html:

<input type="text" formControlName="currency" [appFormatFields]="CURRENCY"
(change)="onChangeCurrency()">

component.ts

onChangeCurrency() {
this.currency.patchValue(this.currency.value);
}

To see the demo: here!

user_85126520
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