/* @flow */
"use strict";

const isWhitespace = require("./isWhitespace");

/**
 * Returns a Boolean indicating whether the the input string is only whitespace.
 */
module.exports = function(input /*: string*/) /*: boolean*/ {
  let isOnlyWhitespace = true;

  for (let i = 0, l = input.length; i < l; i++) {
    if (!isWhitespace(input[i])) {
      isOnlyWhitespace = false;
      break;
    }
  }

  return isOnlyWhitespace;
};