Detailed explanation of js instance attributes and prototype attributes examples_javascript skills

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Copy code The code is as follows: Test Document //In essence, attributes and methods are the same. Methods are functions whose attributes are reference types. //An object has 4 attributes: // 1, the attribute defined by the constructor through this keyword // 2, the attribute defined by the constructor through var keyword // 3. Properties added to the prototype object of the constructor // //Public attributes of the instance: 1 Attributes defined through the this keyword Accessible 1, 2, 3, 4 //Private attributes of the instance: 2 Attributes defined through the var keyword. Accessible 2 //Shared attributes of the instance: 3 Attributes added through the prototype pointed to by the instance. Accessible 1,3,4 //Static properties of the instance: 4 Properties dynamically added to the object. Accessible 1,3,4 //Summary: // Instance attributes: 1, public // 2, private // 4, static // Prototype attributes: 3, shared

//This is defined as a privileged attribute. All accessible //var is defined as a private property. //Dynamicly added attributes are public attributes. Private property not accessible

//The prototype attribute pointed to by the instance object is the prototype attribute. Private properties are not accessible and have lower priority than public properties

//Instance attributes mainly consist of public attributes and privileged attributes. Both can be accessed by external and prototype properties. The main difference is whether private properties are accessible //Prototype properties have lower priority than instance properties. Accessible by external access and instance properties (except private properties)

//-----------------Here is the dividing line-------------------------- --- //Public properties: properties of the object exposed to the external environment. It is also a property of the object. //Private properties: Properties inside the object are often inaccessible. It only makes sense to consider them at the constructor level. // Static attributes: Dynamically added attributes. It is also a property of the object. // Common properties: Properties shared by all instances generated by the constructor.

Test documentation

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Detailed explanation of js instance attributes and prototype attributes examples_javascript skills

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