babel/packages/babel-traverse
Diogo Franco 81811bf1b9 Fix transform-arrow-functions in { spec: true } shadowing (#6760)
* Fix transform-arrow-functions in { spec: true } shadowing

The function name matching the variable declaration name could
shadow the actual function object inside the generated function,
leading to invalid behavior due to holding a reference to the
original unbound function.

* Combine it with transform-function-name just to be sure in spec: false

* Revert "Fix transform-arrow-functions in { spec: true } shadowing"

This reverts commit 1cafe2561d0b0ddd181b956a85eb074621da12e8.

* Much simpler version of the above fix

* Missing fixture updates

* Avoid using rest/spread to make the tests pass on node 4

* ...actually update _all_ the fixtures
2017-11-08 17:21:30 -05:00
..
2017-03-25 21:46:16 -04:00
2017-11-03 16:03:01 -04:00

@babel/traverse

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

Install

$ npm install --save @babel/traverse

Usage

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

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";
    }
  }
});

📖 Read the full docs here