Chapter 748: NodeCache

Core Idea

This utility class is used in NodeBuilder as an internal cache data structure for node data.

Key Concepts

• id : number (readonly): The id of the cache.
• nodesData : WeakMap.<Node, Object>: A weak map for managing node data.
• parent : NodeCache: Reference to a parent node cache.

Reference Tables

Constructor

Signature
new NodeCache( parent : NodeCache )

Properties

Property	Description
.id : number (readonly)	The id of the cache.
.nodesData : WeakMap.<Node, Object>	A weak map for managing node data.
.parent : NodeCache	Reference to a parent node cache.

Methods

Method	Description
.getData( node : Node ) : Object	Returns the data for the given node.
.setData( node : Node, data : Object )	Sets the data for a given node.

Key Takeaways

1. Most relevant properties: id, nodesData, parent.
2. Key methods: getData, setData.

Connects To

• Source: src/nodes/core/NodeCache.js