Replace text with an identifier #{key}

replace.js

/**
 * @param {string} text - Text with replacement keys identified by #{key}
 * @param {object} replacements - An object used to replace keys from text
 * @return {string} string replaced
 */
  
const replace = (text = "", replacements = {}) => {
    const pattern = /#\{(.*?)\}/g;
    const keys = text.match(pattern) || [];
    return keys.reduce((acc, key) => {
      const pureKey = key.replace(pattern, '$1');
      const replacement = replacements[pureKey] || key;
      return acc.replace(key, replacement);
    }, text);
  }