message: fix: delay might be undefined
diff: -import { createNamespace } from '../utils';
  +import { createNamespace, isDef } from '../utils';
  import { doubleRaf } from '../utils/dom/raf';
  import Icon from '../icon';
  @@ -75,6 +75,8 @@ export default createComponent({
  },
  start() {
  + const delay = isDef(this.delay) ? this.delay * 1000 : 0;
  +
  this.reset();
  setTimeout(() => {
  @@ -94,7 +96,7 @@ export default createComponent({
  this.contentWidth = contentWidth;
  });
  }
  - }, this.delay * 1000);
  + }, delay);
  },
  },
  