[Node.js] Escape function for PostgreSQL LIKE/ILIKE operator

escape-postgresql-like-operator.js

/**
 * Escapes pattern-characters of LIKE and ILIKE operators.
 * 
 * @example
 * query('SELECT * FROM articles WHERE title LIKE $1', [ '%' + escapePostgresLikeOperator(searchString) + '%' ])
 *
 * @param input {string} string to escape
 *
 * @returns {string} the string to use in LIKE/ILIKE clause
 */
export function escapePostgresLikeOperator(input) {
  return input.replace(/\\/g, '\\\\').replace(/\_/g, '\\_').replace(/%/g, '\\%');
}

escape-postgresql-like-operator.ts

/**
 * Escapes pattern-characters of LIKE and ILIKE operators.
 * 
 * @example
 * query('SELECT * FROM articles WHERE title LIKE $1', [ '%' + escapePostgresLikeOperator(searchString) + '%' ])
 *
 * @param input {string} string to escape
 *
 * @returns {string} the string to use in LIKE/ILIKE clause
 */
export function escapePostgresLikeOperator(input: string): string {
  return input.replace(/\\/g, '\\\\').replace(/\_/g, '\\_').replace(/%/g, '\\%');
}