@simongrasinovski/str-utils/dist/substringBetween.js

A lightweight utility library for effortless string manipulation. Simplify common tasks like case validation, conversion and formatting with easy-to-use functions that enhance your JavaScript applications

"use strict";

var _require = require('./utils'),
  ensureString = _require.ensureString;

/**
 * Extracts a substring between two characters.
 *
 * @function
 * @param {string} input - The string to search.
 * @param {string} startChar - Start character.
 * @param {string} endChar - End character.
 * @returns {string} Exctacted substring.
 *
 * @throws {TypeError} Throws an error if the input is not a string.
 *
 * @example
 * const result = substringBetween('hello world, hello [from] string utils', '[', ']');
 * console.log(result); // 'from'
 */
module.exports = ensureString(function (input, from, to) {
  var startIndex = input.indexOf(from);
  var endIndex = input.indexOf(to, startIndex + from.length);
  if (startIndex === -1 || endIndex === -1) return '';
  return input.substring(startIndex + from.length, endIndex);
});