lodash/internal/baseDelay.js

import baseSlice from './baseSlice';
import isFunction from '../lang/isFunction';

/** Used as the `TypeError` message for "Functions" methods. */
var FUNC_ERROR_TEXT = 'Expected a function';

/**
 * The base implementation of `_.delay` and `_.defer` which accepts an index
 * of where to slice the arguments to provide to `func`.
 *
 * @private
 * @param {Function} func The function to delay.
 * @param {number} wait The number of milliseconds to delay invocation.
 * @param {Object} args The `arguments` object to slice and provide to `func`.
 * @returns {number} Returns the timer id.
 */
function baseDelay(func, wait, args, fromIndex) {
  if (!isFunction(func)) {
    throw new TypeError(FUNC_ERROR_TEXT);
  }
  return setTimeout(function() { func.apply(undefined, baseSlice(args, fromIndex)); }, wait);
}

export default baseDelay;