regjsparser

Parsing Regular Expressions

This feature allows you to parse a regular expression into an abstract syntax tree (AST). The AST can then be used for further analysis or transformation.

const regjsparser = require('regjsparser');
const regex = /abc/;
const ast = regjsparser.parse(regex);
console.log(JSON.stringify(ast, null, 2));

Handling Unicode

This feature allows you to parse regular expressions that include Unicode characters. The 'u' flag is used to indicate that the regular expression should be treated as a sequence of Unicode code points.

const regjsparser = require('regjsparser');
const regex = /\u{1F600}/u;
const ast = regjsparser.parse(regex);
console.log(JSON.stringify(ast, null, 2));

Error Handling

This feature provides error handling capabilities when parsing invalid regular expressions. It throws an error with a descriptive message if the regular expression is not valid.

const regjsparser = require('regjsparser');
try {
  const regex = /[a-z/;
  const ast = regjsparser.parse(regex);
} catch (e) {
  console.error('Parsing error:', e.message);
}