英語 での Prototype chain の使用例とその 日本語 への翻訳
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We consider this model to show on the example what has been mentioned in the beginning- the difference between just“a class vs. a prototype” is not so essential(especially if the prototype chain is invariant; for more accurate distinction, it is necessary to consider also a statics in classes).
Creation of prototype chains.
We talk about classes, new, instanceof, prototype chains, and API design.
The first major difference is that inheritance in JavaScript uses prototype chains.
But in some implementations, such as SpiderMonkey, using__noSuchMethod__, it is possible to manage dispatching and delegation to alternative prototype chains.
While the prototype property is used by the language to build the prototype chains, it is still possible to assign any given value to it.
The resulting prototype chain.
This is known as the prototype chain.
Method will not be on the prototype chain.
The next example shows interactions with the prototype chain.
Note: Since for in always traverses the complete prototype chain, it.
Additionally, trying to access nonexistent properties will always traverse the full prototype chain.
Let's do it for the whole document prototype chain, till class Node.
Then via the prototype chain, a child controller could access that same model locally with$scope. model.
Therefore, the first interface in the prototype chain for the span element is HTMLElement.
Also, when iterating over the properties of an object, every enumerable property that is on the prototype chain will be enumerated.
This is often referred to as a prototype chain, and explains why different objects have properties and methods defined on other objects available to them.
However, getting or setting indexed properties on typed arrays will not search in the prototype chain for this property, even when the indices are out of bound.
Changes to the Object prototype object are propagated to all objects unless the properties and methods subject to those changes are overridden further along the prototype chain. Properties.
Methods While the global Boolean object contains no methods of its own, it does inherit some methods through the prototype chain: Boolean instances All Boolean instances inherit from Boolean. prototype. .