https://github.com/discord/eslint-traverse

Create a sub-traversal of an AST node in your ESLint plugin
https://github.com/discord/eslint-traverse

ast babel eslint traverse visitor walk

Last synced: 16 days ago
JSON representation

Create a sub-traversal of an AST node in your ESLint plugin

• Host: GitHub
• URL: https://github.com/discord/eslint-traverse
• Owner: discord
• License: mit
• Created: 2020-04-04T00:12:44.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2022-12-15T18:37:19.000Z (over 1 year ago)
• Last Synced: 2024-05-18T19:45:21.910Z (about 1 month ago)
• Topics: ast, babel, eslint, traverse, visitor, walk
• Language: JavaScript
• Size: 3.91 KB
• Stars: 30
• Watchers: 4
• Forks: 7
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Lists

• my-awesome-stars - discord/eslint-traverse - Create a sub-traversal of an AST node in your ESLint plugin (JavaScript)

README

        
# eslint-traverse

> Create a sub-traversal of an AST node in your ESLint plugin

- Very fast

- Supports "Skipping" & "Stopping" (See below)

- Provides AST ancestor information for every node (Babel-style "Path" object)

## Install

```sh

npm install --save eslint-traverse

```

## Example

```js

import traverse from "eslint-traverse"

export default function(context) {

  return {

    FunctionDeclaration(node) {

      traverse(context, node, path => {

        console.log(path)

        // Path {

        //   node: Node,

        //   parent: Node | null,

        //   parentKey: string | null

        //   parentPath: Path | null

        // }

        if (path.node.type === "FunctionDeclaration") {

          return traverse.SKIP

        }

      })

    }

  }

}

```

## Skipping

If you want to completely ignore a branch of the AST, without visiting any of its

children, you can return `traverse.SKIP` from the visitor.

```js

traverse(context, node, path => {

  if (path.node.type === "FunctionDeclaration") {

    return traverse.SKIP

  }

  // ...

})

```

## Stopping

If you want to stop the traversal completely, without visiting any more nodes

anywhere in the AST, you can return `traversal.STOP` from the visitor.

```js

traverse(context, node, path => {

  if (path.node.type === "Identifier" && path.node.name === "THING_I_WAS_SEARCHING_FOR") {

    return traverse.STOP

  }

  // ...

})

```