javascript - 如何删除 HTML 表格行

Question

我正在使用 Vue.js 单击 ADD 创建 HTML 表格行。对于每一行，我都有一个删除按钮，单击后我想删除当前行。

问题是 tbody 在其他组件中定义，而 thead 在其他组件中。

我知道如何删除

Vue.component("form-row", {
  template: "#row-template",
  props: {
    itemname: String,
    quantity: Number,
    sellingprice: Number,
    amount: Number
  },
  methods: {
    delete() {
      alert("tedt")
    }
  },
  computed: {
    quantitySynced: {
      get() {
        return this.quantity;
      },
      set(v) {
        this.$emit("update:quantity", +v);
      }
    },
    sellingpriceSynced: {
      get() {
        return this.sellingprice;
      },
      set(v) {
        this.$emit("update:sellingprice", +v);
      }
    },
    amountSynced() {
      this.$emit("update:amount", parseFloat(this.quantity) * parseFloat(this.sellingprice));
      return this.amount
    }
  }
});

new Vue({
  el: "#app",
  data() {
    return {
      tableDatas: []
    };
  },
  methods: {
    btnOnClick(v) {
      this.tableDatas.push({
        itemname: "item",
        quantity: 1,
        sellingprice: 55,
        amount: 55
      });
    }
  },
  computed: {
    calculate() {
      return (
        this.tableDatas.reduce((total, {
          amount
        }) => total + amount, 0) || 0
      );
    }
  }
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
  <button type="button" @click="btnOnClick">Add</button>
  <table class="table table-striped table-hover table-bordered mainTable" id="Table">
    <thead>
      <tr>
        <th class="itemName">Item Name</th>
        <th>Quantity</th>
        <th>Selling Price</th>
        <th>Amount</th>
      </tr>
    </thead>
    <tbody>
      <form-row v-for="(row, key) in tableDatas" :key="key" v-bind.sync="row"></form-row>
    </tbody>
  </table>
  <div>
    <label>Total Row's Amount</label>
    <input type="text" disabled :value="calculate">
  </div>
</div>

<script type="text/x-template" id="row-template">
  <tr>
    <td>
      <input class="form-control" readonly :value="itemname" />
    </td>
    <td>
      <input class="form-control text-right" type="number" min="0" step="1" v-model="quantitySynced" />
    </td>
    <td>
      <input class="form-control text-right" type="number" min="0" step=".5" v-model="sellingpriceSynced" />
    </td>
    <td>
      <input readonly class="form-control text-right" type="number" min="0" step="1" :value="amountSynced" />
    </td>
    <td>
      <button>Delete</button>
    </td>
  </tr>
</script>

我该怎么做，删除我知道我可以这样做

    delete(index) {
  console.log("Removing", index);
  this.tableDatas.splice(index, 1);
}

但是tableDatas是在不同的组件中定义的。

Answer 1

您应该能够简单地$emit()删除项目的意图并为其附加适当的处理程序。

child

<button @click="$emit('delete')">Delete</button>

父级

<form-row 
  v-for="(row, key) in tableDatas" :key="key" 
  v-bind.sync="row" 
  @delete="btnOnDelete(key)">
</form-row>

{
  methods: {
    btnOnDelete(key) {
      this.tableDatas.splice(key, 1);
    }
  }
}

Vue.component("form-row", {
  template: "#row-template",
  props: {
    itemname: String,
    quantity: Number,
    sellingprice: Number,
    amount: Number
  },
  computed: {
    quantitySynced: {
      get() {
        return this.quantity;
      },
      set(v) {
        this.$emit("update:quantity", +v);
      }
    },
    sellingpriceSynced: {
      get() {
        return this.sellingprice;
      },
      set(v) {
        this.$emit("update:sellingprice", +v);
      }
    },
    amountSynced() {
      this.$emit("update:amount", parseFloat(this.quantity) * parseFloat(this.sellingprice));
      return this.amount
    }
  }
});

new Vue({
  el: "#app",
  data() {
    return {
      tableDatas: []
    };
  },
  methods: {
    btnOnClick(v) {
      this.tableDatas.push({
        itemname: "item",
        quantity: 1,
        sellingprice: 55,
        amount: 55
      });
    },
    btnOnDelete(key) {
      this.tableDatas.splice(key, 1);
    }
  },
  computed: {
    calculate() {
      return (
        this.tableDatas.reduce((total, {
          amount
        }) => total + amount, 0) || 0
      );
    }
  }
});

Vue.config.productionTip = false;
Vue.config.devtools = false;

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>

<div id="app">
  <button type="button" @click="btnOnClick">Add</button>
  <table class="table table-striped table-hover table-bordered mainTable" id="Table">
    <thead>
      <tr>
        <th class="itemName">Item Name</th>
        <th>Quantity</th>
        <th>Selling Price</th>
        <th>Amount</th>
      </tr>
    </thead>
    <tbody>
      <form-row v-for="(row, key) in tableDatas" :key="key" v-bind.sync="row" @delete="btnOnDelete(key)"></form-row>
    </tbody>
  </table>
  <div>
    <label>Total Row's Amount</label>
    <input type="text" disabled :value="calculate">
  </div>
</div>

<script type="text/x-template" id="row-template">
  <tr>
    <td>
      <input class="form-control" readonly :value="itemname" />
    </td>
    <td>
      <input class="form-control text-right" type="number" min="0" step="1" v-model="quantitySynced" />
    </td>
    <td>
      <input class="form-control text-right" type="number" min="0" step=".5" v-model="sellingpriceSynced" />
    </td>
    <td>
      <input readonly class="form-control text-right" type="number" min="0" step="1" :value="amountSynced" />
    </td>
    <td>
      <button @click="$emit('delete')">Delete</button>
    </td>
  </tr>
</script>