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snapdragon-util

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snapdragon-util

Utilities for the snapdragon parser/compiler.


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9.6M
decreased by-6.79%
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1
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What is snapdragon-util?

The snapdragon-util npm package provides utility functions for working with AST (Abstract Syntax Tree) nodes, which are commonly used in parsers and compilers. It offers a set of tools to manipulate, visit, and manage AST nodes effectively.

What are snapdragon-util's main functionalities?

Visit Nodes

This feature allows you to visit each node in an AST. The provided code sample demonstrates how to traverse an AST and log the type of each node.

const util = require('snapdragon-util');
const ast = { type: 'root', nodes: [{ type: 'text', value: 'Hello' }, { type: 'text', value: 'World' }] };
util.visit(ast, node => console.log(node.type));

Map Nodes

This feature allows you to map over each node in an AST and transform it. The provided code sample demonstrates how to convert the text values of nodes to uppercase.

const util = require('snapdragon-util');
const ast = { type: 'root', nodes: [{ type: 'text', value: 'Hello' }, { type: 'text', value: 'World' }] };
const newAst = util.map(ast, node => {
  if (node.type === 'text') {
    node.value = node.value.toUpperCase();
  }
  return node;
});
console.log(newAst);

Filter Nodes

This feature allows you to filter nodes in an AST based on a condition. The provided code sample demonstrates how to filter nodes that have a value of 'Hello'.

const util = require('snapdragon-util');
const ast = { type: 'root', nodes: [{ type: 'text', value: 'Hello' }, { type: 'text', value: 'World' }] };
const filteredNodes = util.filter(ast, node => node.value === 'Hello');
console.log(filteredNodes);

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Package last updated on 11 Jan 2018

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