Method alwaysContinueBubbling

lib/handler_stack.js:120–125

(handler = null)

  // handlers can use to always return the same value. This then means that the handler itself can
  // be implemented without regard to its return value.
  alwaysContinueBubbling(handler = null) {
    if (typeof handler === "function") {
      handler();
    }
    return this.continueBubbling;
  }

  alwaysSuppressPropagation(handler = null) {
    // TODO(philc): Shorten this.