为什么emitter.on,emitter.off冒红报错呢？

Question

安装mitt成功了的

<script lang='ts'>
import { defineComponent, onUnmounted } from 'vue'
import mitt from 'mitt'
const emitter = mitt()
export default defineComponent({
  emits:['submit'],
  setup(props,context){
    const onSubmit = () => {
      context.emit('submit',true)
    }
    const callback = (test:string) => {
      console.log(test)
    }
    emitter.on('form-item-create', callback)
    onUnmounted(()=>{
      emitter.off('form-item-create', callback) 
    })
    return {
      onSubmit
    }
  }
})
</script>

Answer 1

张轩 2023-01-14 10:09:27

同学你好

请看下一小节，关于新版 mitt 的一些定义更新：

https://coding.imooc.com/lesson/449.html#mid=46661