npm install react-cursorreact-cursor
===============
> Immutable state for React.js
react-cursor hello-world in a fiddle

Cursors are a tool for working with recursive or deeply nested data, immutably. react-cursor is a javascript port of an abstraction that I first saw in ClojureScript. Cursors let your app hold all its state at the root of the UI tree; thus the root is stateful, and all downtree views are stateless.
master is stable, there is a full test suite.
Cursor interface has three methods: value, swap and refine.
* cur.value() return the value in the cursor at some path.
* cur.refine(path, ...paths) return a cursor nested inside another cursor
* cur.swap(f) apply f to the value in the cursor value and puts returned value into the backing store
For frequently used swap functions, see the bundled update-in dependency: see here. Cursor instances have optional syntax sugar for the swap fns provided by update-in; see CursorOperations.js
=== for easy and efficient optimized rendering (see hello world jsfiddle for example)RefCursor, which has reference semantics, this is only useful for working with legacy mutable code_react-cursor is governed under the MIT License._
react-cursor was built by Daniel Miladinov and Dustin Getz.