Vue.js

Posted by Bruce Tsai
09/08/2016

• Vue.js

Vue.js 是以 ViewModel 為基礎發展的 JavaScript library。與其他前端框架不同的是，Vue.js 的目標是用簡單的 API 來實作資料繫結與操作網頁上的組件， 同時也因為 Vue.js 只把焦點關注在 View 層級上，遂能夠輕易地與其他 JS library 整合使用。

範例

<!-- component template -->
<script type="text/x-template" id="grid-template">
  <table>
    <thead>
      <tr>
        <th v-for="key in columns"
          @click="sortBy(key)"
          :class="{active: sortKey == key}">
          {{key | capitalize}}
          <span class="arrow"
            :class="sortOrders[key] > 0 ? 'asc' : 'dsc'">
          </span>
        </th>
      </tr>
    </thead>
    <tbody>
      <tr v-for="
        entry in data
        | filterBy filterKey
        | orderBy sortKey sortOrders[sortKey]">
        <td v-for="key in columns">
          {{entry[key]}}
        </td>
      </tr>
    </tbody>
  </table>
</script>

<!-- demo root element -->
<div id="demo">
  <form id="search">
    Search <input name="query" v-model="searchQuery">
  </form>
  <demo-grid
    :data="gridData"
    :columns="gridColumns"
    :filter-key="searchQuery">
  </demo-grid>
</div>

// register the grid component
Vue.component('demo-grid', {
  template: '#grid-template',
  props: {
    data: Array,
    columns: Array,
    filterKey: String
  },
  data: function () {
    var sortOrders = {}
    this.columns.forEach(function (key) {
      sortOrders[key] = 1
    })
    return {
      sortKey: '',
      sortOrders: sortOrders
    }
  },
  methods: {
    sortBy: function (key) {
      this.sortKey = key
      this.sortOrders[key] = this.sortOrders[key] * -1
    }
  }
})

// bootstrap the demo
var demo = new Vue({
  el: '#demo',
  data: {
    searchQuery: '',
    gridColumns: ['name', 'power'],
    gridData: [
      { name: 'Chuck Norris', power: Infinity },
      { name: 'Bruce Lee', power: 9000 },
      { name: 'Jackie Chan', power: 7000 },
      { name: 'Jet Li', power: 8000 }
    ]
  }
})