@c_s_v_s_subrahmanyam/string-utils/src/utils/partitioning.js

A comprehensive utility library for advanced string operations.

// Partitioning utilities
module.exports = {
    partition: (str, delimiter) => {
      const index = str.indexOf(delimiter);
      if (index === -1) return [str, '', ''];
      return [str.slice(0, index), delimiter, str.slice(index + delimiter.length)];
    },
  
    rpartition: (str, delimiter) => {
      const index = str.lastIndexOf(delimiter);
      if (index === -1) return [str, '', ''];
      return [str.slice(0, index), delimiter, str.slice(index + delimiter.length)];
    },
  };