What is the best way to use checkboxes in VueJS to apply filters on a loop and display specific results?

Question

What is the best way to use checkboxes in VueJS to apply filters on a loop and display specific results?

I'm struggling with implementing filters using checkboxes on a list of results and could really use some assistance.

Currently, only the 'All' option is working for applying any filtering logic.

Here is how my HTML looks like with the filters and loop:

<div class="container" id="clubs">
    <div class="filter">
        <label><input type="checkbox" v-model="selectedCategory" value="All" /> All</label>
        <label><input type="checkbox" v-model="selectedCategory" value="Parking" /> Parking</label>
        <label><input type="checkbox" v-model="selectedCategory" value="Toilets" /> Toilets</label>
        <label><input type="checkbox" v-model="selectedCategory" value="Floodlights" /> Floodlights</label>
    </div>

    <ul class="clubs-list">
        <li v-for="club in filteredClubs">{{ club.clubName }}</li>
    </ul>
</div>

And here's the code inside my VueJS app:

var vm = new Vue({
    el:  "#clubs",
    data: {
        clubs: [
            { clubName: "Club One", clubParking: true, clubToilets: false, clubFloodlights: true },
            { clubName: "Club Two", clubParking: true, clubToilets: false, clubFloodlights: false },
            { clubName: "Club Three", clubParking: false, clubToilets: true, clubFloodlights: true },
        ],
        selectedCategory: "All"
    },
    computed: {
        filteredClubs: function() {
            var vm = this;
            var category = vm.selectedCategory;

            if(category === "All") {
                return vm.clubs;
            } else {
                return vm.clubs.filter(function(club) {
                    return club.clubParking === category;
                });
            }
        }
    }
});

I'd appreciate any help as I've been stuck on this issue for hours.

javascript vue.js vuejs2

Answer 1

Answer №1

To enhance your filtering process, consider updating the filter criteria based on the category and field.

return vm.clubs.filter(function(club) {
  switch(category){
     case 'Toilets':
      return club.clubToilets;
     case 'Parking':
      return club.clubParking;
     // etc...
  }
});

You can optimize the code by assigning a field name for better readability.

return vm.clubs.filter(function(club) {
  let fname;
  switch(category){
     case 'Toilets':
      fname ='clubToilets';
     case 'Parking':
      fname = 'clubParking';
     // etc...
  }
  return club[fname]
});

Alternatively, you can simplify the process by directly using the selected category as the field name, though this may limit additional logic possibilities.

<label><input type="checkbox" v-model="selectedCategory" value="clubParking" /> Parking</label>

return vm.clubs.filter(function(club) {
  return club[category];
}

The key concept here is to map the category to the corresponding field in your object.

For multiple items:

// Map the field names based on checkbox values. `selectedCategory` should be an array.

const selectedFieldNames =  selectedCategory.map(category=>{
      switch(category){
         case 'Toilets':
          return 'clubToilets';
         case 'Parking':
          return 'clubParking';
         // etc...
      }
})

// selectedFieldNames now contains the names of your object fields

// This will filter and return items with all specified fields set to 'true'
return vm.clubs.filter(function(club) {
  return selectedFieldNames.every(fname=>club[fname])
}

Example Using Your Provided Code Structure.

Note: The code could use some improvements, but it's kept in a format that allows for easy reference.

var vm = new Vue({
el: "#clubs",
data: {
clubs: [
{
clubName: "Club One",
clubParking: true,
clubToilets: false,
clubFloodlights: true
},
{
clubName: "Club Two",
clubParking: true,
clubToilets: false,
clubFloodlights: false
},
{
clubName: "Club Three",
clubParking: false,
clubToilets: true,
clubFloodlights: true
}
],
selectedCategory: []
},
computed: {
filteredClubs: function() {
var vm = this;
var categories = vm.selectedCategory;
      
if (categories.includes("All")) {
return vm.clubs;
} else {
const selectedFieldNames = categories.map(category => {
switch (category) {
case "ClubToilets":
return "clubToilets";
case "ClubParking":
return "clubParking";
case "ClubFloodlights":
return "clubFloodlights";
}
});

return vm.clubs.filter(function(club) {
return selectedFieldNames.every(fname=>club[fname])
})
}
}
}
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div class="container" id="clubs">
<div class="filter">
<label><input type="checkbox" v-model="selectedCategory" value="All" /> All</label>
<label><input type="checkbox" v-model="selectedCategory" value="ClubParking" /> Parking</label>
<label><input type="checkbox" v-model="selectedCategory" value="ClubToilets" /> Toilets</label>
<label><input type="checkbox" v-model="selectedCategory" value="ClubFloodlights" /> Floodlights</label>
</div>

<ul class="clubs-list">
<li v-for="club in filteredClubs">{{ club.clubName }}</li>
</ul>
</div>

Answer 2

To enhance your filtering process, consider updating the filter criteria based on the category and field.

return vm.clubs.filter(function(club) {
  switch(category){
     case 'Toilets':
      return club.clubToilets;
     case 'Parking':
      return club.clubParking;
     // etc...
  }
});

You can optimize the code by assigning a field name for better readability.

return vm.clubs.filter(function(club) {
  let fname;
  switch(category){
     case 'Toilets':
      fname ='clubToilets';
     case 'Parking':
      fname = 'clubParking';
     // etc...
  }
  return club[fname]
});

Alternatively, you can simplify the process by directly using the selected category as the field name, though this may limit additional logic possibilities.

<label><input type="checkbox" v-model="selectedCategory" value="clubParking" /> Parking</label>

return vm.clubs.filter(function(club) {
  return club[category];
}

The key concept here is to map the category to the corresponding field in your object.

For multiple items:

// Map the field names based on checkbox values. `selectedCategory` should be an array.

const selectedFieldNames =  selectedCategory.map(category=>{
      switch(category){
         case 'Toilets':
          return 'clubToilets';
         case 'Parking':
          return 'clubParking';
         // etc...
      }
})

// selectedFieldNames now contains the names of your object fields

// This will filter and return items with all specified fields set to 'true'
return vm.clubs.filter(function(club) {
  return selectedFieldNames.every(fname=>club[fname])
}

Example Using Your Provided Code Structure.

Note: The code could use some improvements, but it's kept in a format that allows for easy reference.

var vm = new Vue({
el: "#clubs",
data: {
clubs: [
{
clubName: "Club One",
clubParking: true,
clubToilets: false,
clubFloodlights: true
},
{
clubName: "Club Two",
clubParking: true,
clubToilets: false,
clubFloodlights: false
},
{
clubName: "Club Three",
clubParking: false,
clubToilets: true,
clubFloodlights: true
}
],
selectedCategory: []
},
computed: {
filteredClubs: function() {
var vm = this;
var categories = vm.selectedCategory;
      
if (categories.includes("All")) {
return vm.clubs;
} else {
const selectedFieldNames = categories.map(category => {
switch (category) {
case "ClubToilets":
return "clubToilets";
case "ClubParking":
return "clubParking";
case "ClubFloodlights":
return "clubFloodlights";
}
});

return vm.clubs.filter(function(club) {
return selectedFieldNames.every(fname=>club[fname])
})
}
}
}
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div class="container" id="clubs">
<div class="filter">
<label><input type="checkbox" v-model="selectedCategory" value="All" /> All</label>
<label><input type="checkbox" v-model="selectedCategory" value="ClubParking" /> Parking</label>
<label><input type="checkbox" v-model="selectedCategory" value="ClubToilets" /> Toilets</label>
<label><input type="checkbox" v-model="selectedCategory" value="ClubFloodlights" /> Floodlights</label>
</div>

<ul class="clubs-list">
<li v-for="club in filteredClubs">{{ club.clubName }}</li>
</ul>
</div>

What is the best way to use checkboxes in VueJS to apply filters on a loop and display specific results?

Answer №1

For multiple items:

Example Using Your Provided Code Structure.

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