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eslint-visitor-keys

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eslint-visitor-keys

Constants and utilities about visitor keys to traverse AST.

  • 2.0.0
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  • npm
  • Socket score

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75M
decreased by-7.85%
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What is eslint-visitor-keys?

The eslint-visitor-keys package is designed to provide a list of keys that ESLint uses to visit properties in an Abstract Syntax Tree (AST). This is particularly useful for developers working on tools that need to manipulate or analyze JavaScript code, as it helps in navigating the structure of the code in a predictable manner.

What are eslint-visitor-keys's main functionalities?

Retrieving Visitor Keys

This feature allows you to retrieve a comprehensive list of visitor keys used by ESLint. These keys represent the properties of AST nodes that ESLint will traverse. The code sample demonstrates how to import and log the visitor keys.

const visitorKeys = require('eslint-visitor-keys').KEYS;
console.log(visitorKeys);

Union With Custom Keys

This feature enables the combination of ESLint's default visitor keys with custom keys defined by the user. This is useful for tools that work with custom syntax or AST nodes not covered by the default set. The code sample shows how to merge custom keys with the default ones.

const { unionWith } = require('eslint-visitor-keys');
const customKeys = { CustomNode: ['property'] };
const combinedKeys = unionWith(customKeys);
console.log(combinedKeys);

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Package last updated on 14 Aug 2020

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