lodash/utility/attempt.js

import baseSlice from '../internal/baseSlice';
import isError from '../lang/isError';

/**
 * Attempts to invoke `func`, returning either the result or the caught error
 * object. Any additional arguments are provided to `func` when it is invoked.
 *
 * @static
 * @memberOf _
 * @category Utility
 * @param {*} func The function to attempt.
 * @returns {*} Returns the `func` result or error object.
 * @example
 *
 * // avoid throwing errors for invalid selectors
 * var elements = _.attempt(function(selector) {
 *   return document.querySelectorAll(selector);
 * }, '>_>');
 *
 * if (_.isError(elements)) {
 *   elements = [];
 * }
 */
function attempt(func) {
  try {
    return func.apply(undefined, baseSlice(arguments, 1));
  } catch(e) {
    return isError(e) ? e : new Error(e);
  }
}

export default attempt;