Function process_custom_pre_function

lib/utils/index.js:188–191

* Parse custom_pre_function options * @private * @param {object|*} customPreFunction a custom function object containing function_type and source values * @return {string|*} custom_pre_function transformation string

(customPreFunction)

 * @return {string|*} custom_pre_function transformation string
 */
function process_custom_pre_function(customPreFunction) {
  let result = process_custom_function(customPreFunction);
  return utils.isString(result) ? `pre:${result}` : null;
}

/**
 * Parse "if" parameter