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我正在尝试将 javascript 类作为插件注入。

我收到以下错误: 无法读取未定义的属性“日志”

要注入的类:

// helper/logging.service.js

export class LoggingService {
  constructor (prefix) {
      this.prefix = prefix
  }

  log (message) {
      console.log(`[${this.prefix}] ${message}`)
  }

  debug (message) {
      console.debug(`[${this.prefix}] ${message}`)
  }

  warn (message) {
      console.warn(`[${this.prefix}] ${message}`)
  }
}

插入:

// plugins/logger.client.js

import { LoggingService } from '../helper/logging.service'

export default ({ app }, inject) => {
  // create an instance of the LoggingService with the prefix 'My App'
  const logging = new LoggingService('My App')

  // inject the service, making it available in the context, component, store, etc.
  inject('logging', logging)
}

用法:

// pages/logger.vue

<template>
  <button @click="log('Button clicked!')">Click Me</button>
</template>

<script>  
export default {
  name: 'ExamplePage',

  created () {
    this.$logging.log('Component created!')   // error is here
  },

  mounted () {
    this.$logging.debug('Component mounted!')
  },

  methods: {
    log (message) {
      this.$logging.warn(message)
    }
  }
}
</script>

更新:

看起来插件在客户端创建的钩子中不可用,为什么?如果我将插件转换为服务器客户端插件,它就可以工作。

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