Function stateStr

docs/tests/v2/es6/js/sanddance.js:52983–52995

* get a usable string, used as event postfix * @param {Const} state * @returns {String} state

(state)

   */

  function stateStr(state) {
    if (state & STATE_CANCELLED) {
      return 'cancel';
    } else if (state & STATE_ENDED) {
      return 'end';
    } else if (state & STATE_CHANGED) {
      return 'move';
    } else if (state & STATE_BEGAN) {
      return 'start';
    }

    return '';
  }
  /**
   * direction cons to string
   * @param {Const} direction