created() {
    const url = 'https://ssl.captcha.qq.com/TCaptcha.js'
    const script = document.createElement('script')
    script.type = 'text/javascript'
    script.src = url
    document.body.appendChild(script)
    script.onload = () => {
      console.log(window.TencentCaptcha, 'script已经成功加载')
      this.getAppid()
    }
  },

    varify() {
      // 生成一个滑块验证码对象
      const appid = this.captchaAppId.toString()
      // eslint-disable-next-line
      let captcha = new window.TencentCaptcha(appid, res => {
        // 用户滑动结束或者关闭弹窗，腾讯返回的内容
        if (res.ret === 0) {
          this.randstr = res.randstr
          this.ticket = res.ticket
          // 验证成功
          console.log('验证成功')
        } else {
          // 提示用户完成验证
          console.log('验证失败')
        }
      })
      // 滑块显示
      captcha.show()
    }