babel-traverse

babel-traverse maintains the overall tree state, and is responsible for replacing, removing, and adding nodes.

Install

sh $ npm install --save babel-traverse

Usage

We can use it alongside Babylon to traverse and update nodes:

```js import * as babylon from "babylon"; import traverse from "babel-traverse";

const code = function square(n) { return n * n; };

const ast = babylon.parse(code);

traverse(ast, { enter(path) { if (path.isIdentifier({ name: "n" })) { path.node.name = "x"; } } }); ``` :book: Read the full docs here