根据复选框隐藏/显示表格行 [英] Hide/show table rows based on checkbox

问题描述

我有一些复选框，我想用它们来显示/隐藏表格中的行，这些行的内容与选中的复选框的值相匹配.

复选框:

foo1 &nbsp;<input type='checkbox' name='foo2' value='foo2' v-model="selectedType"/>foo2 &nbsp;<input type='checkbox' name='bar1' value='bar1' v-model="selectedType"/>bar1 &nbsp;

我有一个对象，我曾经使用 v-for 构造一个表:

<template v-for="sampleObj 中的sampleItem"><tr><td>{{sampleItem.item}}</td><td>{{sampleItem.description}}</td></tr></模板>

JS:

new Vue({数据: {所选类型:[]，sampleObj = [{'item': 'item1', 'description': 'foo1 blah'},{'item': 'item2', 'description': 'foo2 vlah'},{'item':'item3'，'描述':'bar1 nlah'}，{'item': 'item4', 'description': 'bar2 clah'},];}});

默认情况下，复选框未选中.因此，只有具有描述为bar2"的单元格的行最初是可见的.然后当我切换其他复选框时，其他行也应该变得可见(描述与复选框值不匹配，但后面有几个词.我可以在这里做一些字符串处理).

我想我可以在标签中使用 v-if 指令来查看 selectedType 的值，但我不确定如何实现这一点.

伪代码:

......</tr>

我怎么能做到这一点?

解决方案

v-if 实际上你有两个条件:如果没有与描述匹配的复选框，你想要的行显示;如果有复选框，则必须选中它.

我将复选框值放入它们所属的数据中.我做了一个测试方法.它首先查看描述是否与任何复选框值匹配，然后检查是否选择了匹配的值.

new Vue({el: '#app',数据: {所选类型:[]，样本对象:[{'项目':'项目1'，'描述':'foo1 等等'},{'项目':'项目2'，'描述':'foo2 vlah'},{'项目':'项目3'，'描述':'bar1 nlah'},{'项目':'项目4'，'描述':'bar2 clah'},],cbValues: ['foo1', 'foo2', 'bar1']},方法: {isVisible(行){constmatchedValue = this.cbValues.find(v => row.description.indexOf(v) >= 0);如果(！匹配值){返回真；}返回 this.selectedType.includes(matchedValue);}}});

td {边框:薄纯黑色；}

<script src="//unpkg.com/vue@latest/dist/vue.js"></script><div id="应用程序"><div v-for="cbValues 中的 val"><标签><input type='checkbox' :value='val' v-model="selectedType">{{val}}

<表格><template v-for="sampleObj 中的sampleItem"><tr v-if="isVisible(sampleItem)"><td>{{sampleItem.item}}</td><td>{{sampleItem.description}}</td></tr></模板>

I have some checkboxes which I'd like to use to show/hide rows in a table whose contents match the values of the checkbox which is selected.

Checkboxes:

<input type='checkbox' name='foo1' value='foo1' v-model="selectedType"/> foo1 &nbsp;
<input type='checkbox' name='foo2' value='foo2' v-model="selectedType"/> foo2 &nbsp;
<input type='checkbox' name='bar1' value='bar1' v-model="selectedType"/> bar1 &nbsp;

I have an object which I used to construct a table using v-for:

<table>
    <template v-for="sampleItem in sampleObj">
        <tr>
           <td>{{sampleItem.item}}</td>
           <td>{{sampleItem.description}}</td>
        </tr>
    </template>
</table>

JS:

new Vue({
    data: {
        selectedType: [],
        sampleObj = [{'item': 'item1', 'description': 'foo1 blah'},
                     {'item': 'item2', 'description': 'foo2 vlah'},
                     {'item': 'item3', 'description': 'bar1 nlah'},
                     {'item': 'item4', 'description': 'bar2 clah'},
        ];
    }
});

By default, the checkboxes are unchecked. So, only the row which has a cell with description 'bar2' is initially visible. Then when I toggle the other checkboxes, the other rows should also become visible (the descriptions don't match the checkbox values verbatim but has a few words following it. I can do some string processing here).

I thought I could use the v-if directive in the tag to look at value of selectedType, but I am not sure how I can accomplish this.

Pseudo-code:

<tr v-if="selectedType ~= /sampleItem.description/">
...
...
</tr> 

How could I accomplish this?

解决方案

You actually have two conditions you need for the v-if: if there is no checkbox matching the description, you want the row to display; if there is a checkbox, it has to be checked.

I put the checkbox values into data, where they belong. I made a method for the test. It first looks to see whether the description matches any checkbox value, then it checks whether the matched value is selected.

new Vue({
  el: '#app',
  data: {
    selectedType: [],
    sampleObj: [{
        'item': 'item1',
        'description': 'foo1 blah'
      },
      {
        'item': 'item2',
        'description': 'foo2 vlah'
      },
      {
        'item': 'item3',
        'description': 'bar1 nlah'
      },
      {
        'item': 'item4',
        'description': 'bar2 clah'
      },
    ],
    cbValues: ['foo1', 'foo2', 'bar1']
  },
  methods: {
    isVisible(row) {
      const matchedValue = this.cbValues.find(v => row.description.indexOf(v) >= 0);

      if (!matchedValue) {
        return true;
      }
      return this.selectedType.includes(matchedValue);
    }
  }
});

td {
  border: thin solid black;
}

<script src="//unpkg.com/vue@latest/dist/vue.js"></script>
<div id="app">
  <div v-for="val in cbValues">
    <label>
      <input type='checkbox' :value='val' v-model="selectedType"> 
      {{val}}
    </label>
  </div>
  <table>
    <template v-for="sampleItem in sampleObj">
        <tr v-if="isVisible(sampleItem)">
           <td>{{sampleItem.item}}</td>
           <td>{{sampleItem.description}}</td>
        </tr>
    </template>
  </table>
</div>

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