在此页

• 描述
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

Number.MIN_SAFE_INTEGER constant represents the minimum safe integer in JavaScript ( -(2 53 - 1) ).

To represent integers smaller than this, consider using 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.

特性属性在 Number.MIN_SAFE_INTEGER
可写	no
可枚举	no
可配置	no

描述

MIN_SAFE_INTEGER constant has a value of -9007199254740991 (-9,007,199,254,740,991 or about -9 quadrillion). The reasoning behind that number is that JavaScript uses double-precision floating-point format numbers 作为指定在 IEEE 754 and can only safely represent numbers between -(2 53 - 1) and 2 53 - 1 .  See Number.isSafeInteger() 了解更多信息。

因为 MIN_SAFE_INTEGER is a static property of Number , you always use it as Number.MIN_SAFE_INTEGER , rather than as a property of a Number object you created.

范例

Using MIN_SAFE_INTEGER

Number.MIN_SAFE_INTEGER // -9007199254740991
-(Math.pow(2, 53) - 1)  // -9007199254740991
				

规范

规范
ECMAScript (ECMA-262) The definition of 'Number.MIN_SAFE_INTEGER' in that specification.

浏览器兼容性

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 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
MIN_SAFE_INTEGER	Chrome 34	Edge 12	Firefox 31	IE No	Opera 21	Safari 9	WebView Android ≤37	Chrome Android 34	Firefox Android 31	Opera Android 21	Safari iOS 9	Samsung Internet Android 2.0	nodejs 0.12

图例

完整支持

完整支持

不支持

不支持

另请参阅

• Number.MAX_SAFE_INTEGER
• Number.isSafeInteger()
• BigInt

元数据

• 最后修改： 2020 年 8 月 13 日

相关话题

1. 标准内置对象
2. Number
3. 特性
   1. Number.EPSILON
   2. Number.MAX_SAFE_INTEGER
   3. Number.MAX_VALUE
   4. Number.MIN_SAFE_INTEGER
   5. Number.MIN_VALUE
   6. Number.NEGATIVE_INFINITY
   7. Number.NaN
   8. Number.POSITIVE_INFINITY
4. 方法
   1. Number.isFinite()
   2. Number.isInteger()
   3. Number.isNaN()
   4. Number.isSafeInteger()
   5. Number.parseFloat()
   6. Number.parseInt()
   7. Number.prototype.toExponential()
   8. Number.prototype.toFixed()
   9. Number.prototype.toLocaleString()
   10. Number.prototype.toPrecision()
   11. Number.prototype.toSource()
   12. Number.prototype.toString()
   13. Number.prototype.valueOf()
5. 继承：
6. Function
7. 特性
   1. Function.arguments
   2. Function.caller
   3. Function.displayName
   4. Function.length
   5. Function.name
8. 方法
   1. Function.prototype.apply()
   2. Function.prototype.bind()
   3. Function.prototype.call()
   4. Function.prototype.toSource()
   5. Function.prototype.toString()
9. Object
10. 特性
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
11. 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()