@babel/traverse

Visiting Nodes

This feature allows you to visit specific nodes in the AST. You can specify the types of nodes you're interested in and provide functions that will be called when those nodes are encountered during traversal.

{"type": "Identifier", "name": "a"}

Modifying Nodes

With @babel/traverse, you can modify nodes in the AST. This can include changing node types, adding or removing properties, or even replacing a node with a different one.

{"type": "Identifier", "name": "b"}

Adding and Removing Nodes

This feature allows you to add new nodes to the AST or remove existing ones. This is useful for code transformations where you need to introduce new variables, functions, or other constructs, or clean up unused code.

{"type": "VariableDeclaration", "declarations": [{"type": "VariableDeclarator", "id": {"type": "Identifier", "name": "c"}, "init": {"type": "Literal", "value": 3, "raw": "3"}}], "kind": "const"}

Scope Management

The package provides utilities for managing scope within the AST. This includes tracking variable declarations, bindings, and references, which is crucial for correctly transforming code without introducing errors.

{"type": "BlockStatement", "body": [], "directives": []}