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emits: 列表申明从父组件继承来的事件
$emit: 抛出事件,告诉父组件解决
子组件中:
export default {
name: "MyXgPlayer",
// 申明从父组件继承来的事件: 能够是简略数组,也能够是对象(加了校验函数)
emits: ['just-one-player'],
props:{
domId: String,
previewVideoUrl: String,
},
setup(props, context){
// 获取以后实例(包含从父组件传过来的 props 数据, 实例办法($watch,$emit, $forceUpdate,$nextTick, 定义的全局的 $addHost
// vue 内含的 $alert,$message,$messageBox, $store,$router, $refs ...))const {proxy} = getCurrentInstance()
let player = ref(null)
onMounted(()=>{
//new 数据
player.value = new Player ({
id: props.domId,
url: props.previewVideoUrl,
});
// 监听 play 事件
player.value.on('play', ()=>{console.log("start $emit")
// 给父组件抛事件
proxy.$emit("just-one-player", props.domId, player)
})
})
},
}
父组件中
<my-xg-player
:dom-id="'xgplayer_test_'+file.collection_id":preview-video-url="file.file_path"@justOnePlayer="justOnePlayer"
/>
<!--script 中 -->
import {ref} from "vue"
setup(props, context){const xgplayers = ref({})
const justOnePlayer = (domId, player)=>{console.log("receive $emit")
for(let item_key in state.xgplayers){if(item_key !== domId){state.xgplayers[item_key].pause()}
}
state.xgplayers[domId] = player
}
return {
xgplayers,
justOnePlayer
}
}
}
点击子组件中的播放,打印的 log
start $emit
receive $emit
正文完