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The Number.prototype
property represents the prototype for the Number
constructor.
Property attributes of Number.prototype |
|
---|---|
Writable | no |
Enumerable | no |
Configurable | no |
Description
All Number
instances inherit from Number.prototype
. The prototype object of the Number
constructor can be modified to affect all Number
instances.
Properties
Number.prototype.constructor
- Returns the function that created this object's instance. By default this is the
Number
object.
Methods
Number.prototype.toExponential()
- Returns a string representing the number in exponential notation.
Number.prototype.toFixed()
- Returns a string representing the number in fixed-point notation.
Number.prototype.toLocaleString()
- Returns a string with a language sensitive representation of this number. Overrides the
Object.prototype.toLocaleString()
method. Number.prototype.toPrecision()
- Returns a string representing the number to a specified precision in fixed-point or exponential notation.
Number.prototype.toSource()
- Returns an object literal representing the specified
Number
object; you can use this value to create a new object. Overrides theObject.prototype.toSource()
method. Number.prototype.toString()
- Returns a string representing the specified object in the specified radix (base). Overrides the
Object.prototype.toString()
method. Number.prototype.valueOf()
- Returns the primitive value of the specified object. Overrides the
Object.prototype.valueOf()
method.
Specifications
Specification | Status | Comment |
---|---|---|
ECMAScript 1st Edition (ECMA-262) | Standard | Initial definition. Implemented in JavaScript 1.1. |
ECMAScript 5.1 (ECMA-262) The definition of 'Number' in that specification. |
Standard | |
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Number' in that specification. |
Standard | |
ECMAScript 2017 Draft (ECMA-262) The definition of 'Number' in that specification. |
Draft |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |