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  2. JavaScript
  3. JavaScript 参考
  4. 标准内置对象
  5. BigInt
  6. BigInt.prototype.toLocaleString()

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toLocaleString() method returns a string with a language-sensitive representation of this BigInt.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

句法 

bigIntObj.toLocaleString([locales [, options]])

参数

locales and options arguments customize the behavior of the function and let applications specify the language whose formatting conventions should be used. In implementations that ignore the locales and options arguments, the locale used and the form of the string returned are entirely implementation-dependent.

见 Intl.NumberFormat() 构造函数 for details on these parameters and how to use them.

返回值

A string with a language-sensitive representation of the given BigInt.

Performance

When formatting large numbers of numbers, it is better to create a NumberFormat object and use the function provided by its NumberFormat.format 特性。

范例

使用 toLocaleString

In basic use without specifying a locale, a formatted string in the default locale and with default options is returned. 

var bigint = 3500n;
bigint.toLocaleString();
// Displays "3,500" if in U.S. English locale

使用 locales

This example shows some of the variations in localized number formats. In order to get the format of the language used in the user interface of your application, make sure to specify that language (and possibly some fallback languages) using the locales argument: 

var bigint = 123456789123456789n;
// German uses period for thousands
console.log(bigint.toLocaleString('de-DE'));
// → 123.456.789.123.456.789
// Arabic in most Arabic speaking countries uses Eastern Arabic digits
console.log(bigint.toLocaleString('ar-EG'));
// → ١٢٣٬٤٥٦٬٧٨٩٬١٢٣٬٤٥٦٬٧٨٩
// India uses thousands/lakh/crore separators
console.log(bigint.toLocaleString('en-IN'));
// → 1,23,45,67,89,12,34,56,789
// the nu extension key requests a numbering system, e.g. Chinese decimal
console.log(bigint.toLocaleString('zh-Hans-CN-u-nu-hanidec'));
// → 一二三,四五六,七八九,一二三,四五六,七八九
// when requesting a language that may not be supported, such as
// Balinese, include a fallback language, in this case Indonesian
console.log(bigint.toLocaleString(['ban', 'id']));
// → 123.456.789.123.456.789

使用 options

The results provided by toLocaleString can be customized using the options argument: 

var bigint = 123456789123456789n;
// request a currency format
console.log(bigint.toLocaleString('de-DE', { style: 'currency', currency: 'EUR' }));
// → 123.456.789.123.456.789,00 €
// the Japanese yen doesn't use a minor unit
console.log(bigint.toLocaleString('ja-JP', { style: 'currency', currency: 'JPY' }))
// → ￥123,456,789,123,456,789
// limit to three significant digits
console.log(bigint.toLocaleString('en-IN', { maximumSignificantDigits: 3 }));
// → 1,23,00,00,00,00,00,00,000

规范

规范
ECMAScript (ECMA-262)
The definition of 'BigInt.prototype.toLocaleString()' in that specification.
ECMAScript 国际化 API (ECMA-402)
The definition of 'BigInt.prototype.toLocaleString()' in that specification.

浏览器兼容性

更新 GitHub 上的兼容性数据
Desktop Mobile Server
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet Node.js
toLocaleString Chrome 67 Edge 79 Firefox 68 IE No Opera 54 Safari No WebView Android 67 Chrome Android 67 Firefox Android 68 Opera Android 48 Safari iOS No Samsung Internet Android 9.0 nodejs 10.4.0
locales Chrome 76 Edge 79 Firefox 70 IE No Opera No Safari No WebView Android 76 Chrome Android 76 Firefox Android No Opera Android 54 Safari iOS No Samsung Internet Android No nodejs No
options Chrome 76 Edge 79 Firefox 70 IE No Opera No Safari No WebView Android 76 Chrome Android 76 Firefox Android No Opera Android 54 Safari iOS No Samsung Internet Android No nodejs No

图例

完整支持

完整支持

不支持

不支持

另请参阅

元数据

  • 最后修改：
  1. 标准内置对象
  2. BigInt
  3. 方法
    1. BigInt.asIntN()
    2. BigInt.asUintN()
    3. BigInt.prototype.toLocaleString()
    4. BigInt.prototype.toString()
    5. BigInt.prototype.valueOf()
  4. 继承：
  5. Function
  6. 特性
    1. Function.arguments
    2. Function.caller
    3. Function.displayName
    4. Function.length
    5. Function.name
  7. 方法
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toSource()
    5. Function.prototype.toString()
  8. Object
  9. 特性
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
  10. 方法
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource()
    10. Object.prototype.toString()
    11. Object.prototype.valueOf()
    12. Object.setPrototypeOf()