This is what I write in my component:

A navigation bar

<p class="navbar" v-show="showNavbar">


//js
import Bus from '../../common/js/bus'
export default {
data () {
  return {
    showNavbar: true
  }
},
created () {
  Bus.$on('hideNavbar', function (h) {
    if (h === 1) {
      this.showNavbar = true
    } else if (h === 2) {
      this.showNavbar = false
      console.log('false')
    }
  })

I hope to monitor the status of hideNavbar through Bus.$on, but the browser console reports that showNavbar is not defined
Is there something wrong?