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BigInt() constructor - JavaScript | MDN

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  1. 面向开发者的 Web 技术
  2. JavaScript
  3. JavaScript 参考
  4. JavaScript 标准内置对象
  5. BigInt
  6. BigInt() constructor

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在本文中
  1. JavaScript 标准内置对象
  2. BigInt
  3. 构造函数
    1. BigInt() constructor
  4. 静态方法
    1. BigInt.asIntN()
    2. BigInt.asUintN()
  5. 实例方法
    1. BigInt.prototype.toLocaleString()
    2. BigInt.prototype.toString()
    3. BigInt.prototype.valueOf()
  6. 继承
  7. Object/Function
  8. 静态方法
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toString()
    5. Function.prototype[Symbol.hasInstance]()
  9. 静态属性
    1. Function.displayName 非标准
    2. Function：length
    3. Function.name
    4. Function.prototype.prototype
    5. Function.prototype.arguments 非标准 已弃用
    6. Function.prototype.caller 非标准 已弃用
  10. 实例方法
    1. Object.prototype.__defineGetter__() 已弃用
    2. Object.prototype.__defineSetter__() 已弃用
    3. Object.prototype.__lookupGetter__() 已弃用
    4. Object.prototype.__lookupSetter__() 已弃用
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toString()
    10. Object.prototype.valueOf()
  11. 实例属性
    1. Object.prototype.__proto__ 已弃用
    2. Object.prototype.constructor
在本文中 BigInt() constructor

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2020.

BigInt() 构造函数用来创建 BigInt 对象。

语法

js

BigInt(value)
参数
value

被创建的对象的数值。可以是字符串或整数。

备注： BigInt() 不与 new 运算符一起使用。

示例

js

BigInt(123);
// 123n
规范 Specification ECMAScript® 2026 Language Specification
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