Difference between revisions of "JavaScript prototype"
From Wiki @ Karl Jones dot com
Karl Jones (Talk | contribs) (→External links) |
Karl Jones (Talk | contribs) |
||
| Line 1: | Line 1: | ||
| − | In [[JavaScript]], | + | In [[JavaScript]], '''prototype''' is a property of objects |
== Description == | == Description == | ||
| − | All objects in JavaScript are descended from Object; all objects inherit methods and properties from Object.prototype, although they may be overridden (except an Object with a null prototype, i.e. Object.create(null)). For example, other constructors' prototypes override the constructor property and provide their own toString() methods. | + | All objects in [[JavaScript]] are descended from <code>Object</code>; all objects inherit methods and properties from Object.prototype, although they may be overridden (except an Object with a null prototype, i.e. Object.create(null)). For example, other constructors' prototypes override the constructor property and provide their own toString() methods. |
Changes to the Object prototype object are seen by all objects through prototype chaining, unless the properties and methods subject to those changes are overridden further along the prototype chain. This provides a very powerful although potentially dangerous mechanism to override or extend object behavior. | Changes to the Object prototype object are seen by all objects through prototype chaining, unless the properties and methods subject to those changes are overridden further along the prototype chain. This provides a very powerful although potentially dangerous mechanism to override or extend object behavior. | ||
Latest revision as of 12:13, 11 November 2016
In JavaScript, prototype is a property of objects
Description
All objects in JavaScript are descended from Object; all objects inherit methods and properties from Object.prototype, although they may be overridden (except an Object with a null prototype, i.e. Object.create(null)). For example, other constructors' prototypes override the constructor property and provide their own toString() methods.
Changes to the Object prototype object are seen by all objects through prototype chaining, unless the properties and methods subject to those changes are overridden further along the prototype chain. This provides a very powerful although potentially dangerous mechanism to override or extend object behavior.
