Number.MIN_SAFE_INTEGER

Number.MIN_SAFE_INTEGER 代表在 JavaScript中最小的安全的integer型数字 (-(253 - 1)).

Number.MIN_SAFE_INTEGER 属性的属性特性：
writable false
enumerable false
configurable false

描述

MIN_SAFE_INTEGER 的值是-9007199254740991. 形成这个数字的原因是 JavaScript 在 IEEE 754中使用double-precision floating-point format numbers 作为规定。在这个规定中能安全的表示数字的范围在-(253 - 1) 到 253 - 1之间.

由于MIN_SAFE_INTEGER 是Number的属性。 

示例

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

规范

Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
Number.MIN_SAFE_INTEGER		 Standard Initial definition.
ECMAScript Latest Draft (ECMA-262)
Number.MIN_SAFE_INTEGER		 Draft

浏览器支持

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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 Full support 34 Edge Full support 12 Firefox Full support 31 IE No support No Opera Full support Yes Safari Full support 9 WebView Android Full support Yes Chrome Android Full support 34 Firefox Android Full support 31 Opera Android Full support Yes Safari iOS Full support 9 Samsung Internet Android Full support Yes nodejs Full support 0.12

Legend

Full support  
Full support
No support  
No support

参阅

  1. JavaScript 标准库
  2. Number
  3. 属性
    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
    9. Number.prototype
  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()
    14. Number.toInteger()
  5. 继承
  6. Function
  7. 属性
    1. Function.arguments
    2. Function.arity
    3. Function.caller
    4. Function.displayName
    5. Function.length
    6. Function.name
    7. Function.prototype
  8. 方法
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.isGenerator()
    5. Function.prototype.toSource()
    6. Function.prototype.toString()
  9. Object
  10. 属性
    1. Object.prototype.__count__
    2. Object.prototype.__noSuchMethod__
    3. Object.prototype.__parent__
    4. Object.prototype.__proto__
    5. 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.unwatch()
    12. Object.prototype.valueOf()
    13. Object.prototype.watch()
    14. Object.setPrototypeOf()