Vue-js一些練習

1.filter使用 2.Object.keys使用(取得物件屬性) 3.物件內容比對

by cactus77kiki

HTML

<script src="https://cdn.jsdelivr.net/npm/[email protected]"></script>
<div id="app">
  <h2>Todos:</h2>
  <input type="text" v-model="condition"/><br/>
  <input type="button" value="find" v-on:click="getbyid()"/>
  <input type="button" value="find keys" v-on:click="getobjectkeys()"/>
  <input type="button" value="get compare" v-on:click="comparebykey()"/><br/>
  <span v-for="(row,index) in result">{{row.id}} - {{row.text}}<br/></span>
  <hr/>
  <span v-for="(row,index) in keylist">
    {{row}}
  </span>
  <hr/>
  <span v-for="(row,index) in comparelist">
    {{row.key}} - {{row.value}}<br/>
  </span>
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

del {
  color: rgba(0, 0, 0, 0.3);
}

Vue

var app = new Vue({
  el: "#app",
  data: {
    todos: [
      { text: "Learn JavaScript", done: false,kind:"A",id:1 },
      { text: "Learn Vue", done: false,kind:"A",id:2 },
      { text: "Play around in JSFiddle", done: true,kind:"B",id:3 },
      { text: "Build something awesome", done: true,kind:"B",id:4 }
    ],
    condition:"",
    result:[],
    keylist:[],
    comparelist:[]
  },
  methods: {
  //比對物件(note:僅能比對一層，無法比對具多層次的屬性的物件)
    comparebykey: function(){
    	var param = this.keylist;
    	var ObjA={text: "Learn JavaScript", done: false,kind:"A",id:1};
      var ObjB={text: "Learn Math", done: false,kind:"B",id:1};
      var result=[];
      param.forEach(function(e) {
  			if ( ObjA[e] != ObjB[e] ){ 
          	var eblank={};
       			eblank.key=e;
            eblank.value=ObjB[e];
            result.push(eblank);
        	}
			});
    	
      this.comparelist = result;
    },
    //取得物件屬性
    getobjectkeys:function(){
    	var arry = Object.keys(this.result[0]);
    	this.keylist = arry;
    },
    //取得資料(byid):filter(回傳陣列)
    getbyid: function(){
    	var param = this.condition;
     	var findarry = this.todos.filter(function(index){
				return index.id>param;
			});
      this.result = findarry;
    },
  	toggle: function(todo){
    	todo.done = !todo.done
    }
  }
})