ae168edcfa
package.json "babel-messages" removed:
- babel-core
- babel-helper-replace-supers
- babel-plugin-transform-es2015-classes
- babel-traverse
"messages" remove from:
- babel-plugin-check-es2015-constants/src/index.js
- babel-plugin-transform-es2015-for-of/src/index.js
export "babel-messages" removed from:
- babel-core/src/index.js
import "babel-messages" removed from:
- babel-generator/src/index.js
- babel-helper-replace-supers/src/index.js
- babel-traverse/src/index.js
- babel-traverse/src/scope/index.js
- babel-traverse/src/visitors.js
package "babel-messages" removed completely.
💯️ All tests pass.
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";
}
}
});