一定要加这句

window.location.href = ‘http://www.baidu.com/s?wd=’ + this.wd;
关于Vue跳转外部链接（百度为例）_vue3.2 点击按钮 router.resolve 跳转 百度-CSDN博客

getCaptcha1 () {
  location.href = 'http://www.baidu.com'
}