vuejs父子組件之間數據交互詳解

2019-11-19 15:51:32

字體：大中小

來源：轉載

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父子組件之間的數據交互遵循：

props down - 子組件通過props接受父組件的數據
events up - 父組件監聽子組件$emit的事件來操作數據

示例

子組件的點擊事件函數中$emit自定義事件

export default { name: 'comment', props: ['issue','index'], data () { return {  comment: '', } }, components: {}, methods: { removeComment: function(index,cindex) {  this.$emit('removeComment', {index:index, cindex:cindex}); }, saveComment: function(index) {  this.$emit('saveComment', {index: index, comment: this.comment});  this.comment=""; } }, //hook  created: function () { //get init data }}

父組件監聽事件

復制代碼代碼如下:

<comment v-show="issue.show_comments" :issue="issue" :index="index" @removeComment="removeComment" @saveComment="saveComment"></comment>

父組件的methods中定義了事件處理程序

 removeComment: function(data) {  var index = data.index, cindex = data.cindex;  var issue = this.issue_list[index];  var comment = issue.comments[cindex];  axios.get('comment/delete/cid/'+comment.cid)  .then(function (resp) {  issue.comments.splice(cindex,1);  }); }, saveComment: function(data) {  var index = data.index;  var comment = data.comment;  var that = this;  var issue =that.issue_list[index];  var data = {  iid: issue.issue_id,  content: comment  };  axios.post('comment/save/',data)  .then(function (resp) {  issue.comments=issue.comments||[];  issue.comments.push({   cid: resp.data,   content: comment  });  });    //clear comment input  this.comment=""; } },

注意參數的傳遞是一個對象

其實還有更多的場景需要組件間通信

官方推薦的通信方式