Nuxt/test/fixtures/basic/plugins/inject.js

export default ({ route, params }, inject) => {
  const { injectValue } = route.query
  if (typeof injectValue === 'undefined') {
    return
  }
  const key = 'injectedProperty'
  const map = {
    undefined,
    'null': null,
    'false': false,
    '0': 0,
    'empty': ''
  }
  const value = map[injectValue]
  inject(key, value)
}