Vuejs2 - List rendering filtered with computed properties
I've some problems with list rendering and filtering the data with computed properties
Instead of hardcoded row.age value, I'd like to use filterKey to filter row.age.
How to archieve this? I just don't get it.
Here's my example:
template:
<button type="button" class="btn btn-t1-secondary" v-on: click="filterKey = '15'">11</button>
<button type="button" class="btn btn-t1-secondary" v-on: click="filterKey = '30'">8</button>
<table>
<thead>
<tr>
<th>Category</th>
<th>Age</th>
<th>Food</th>
</tr>
</thead>
<tbody>
<tr v-for="row in filteredCategory">
<td>{{ row.category }}</td>
<td>{{ row.age }}</td>
<td>{{ row.food }}</td>
</tr>
</tbody>
</table>
JavaScript:
<script>
var app = new Vue({
el: '#app',
data: {
filterKey: '',
filterCategory: '',
dataToFilter: [
{
category: 'dog',
age: '11',
food: 'bone'
},
{
category: 'cat',
age: '8',
food: 'fish'
}
//etc.
]
},
computed: {
filteredCategory() {
return this.dataToFilter.filter(function (row) {
return row.category === 'dog'
})
.filter(function (row) {
console.log(this.filterKey)
return row.age === '15'
})
},
}
})
</script>
Solution
As @Sadraque_Santos suggested, I used arrow functions.
Code
filteredCategory() {
return this.dataToFilter.filter( r => r.category === 'dog' && r.age === this.filterKey);
}
Also, I have to support IE11 so I just use Babel to compile the code for me.
vue.js computed-properties
asked Nov 21 '18 at 12:57
user9568723
8816
add a comment |
I've some problems with list rendering and filtering the data with computed properties
Instead of hardcoded row.age value, I'd like to use filterKey to filter row.age.
How to archieve this? I just don't get it.
Here's my example:
template:
<button type="button" class="btn btn-t1-secondary" v-on: click="filterKey = '15'">11</button>
<button type="button" class="btn btn-t1-secondary" v-on: click="filterKey = '30'">8</button>
<table>
<thead>
<tr>
<th>Category</th>
<th>Age</th>
<th>Food</th>
</tr>
</thead>
<tbody>
<tr v-for="row in filteredCategory">
<td>{{ row.category }}</td>
<td>{{ row.age }}</td>
<td>{{ row.food }}</td>
</tr>
</tbody>
</table>
JavaScript:
<script>
var app = new Vue({
el: '#app',
data: {
filterKey: '',
filterCategory: '',
dataToFilter: [
{
category: 'dog',
age: '11',
food: 'bone'
},
{
category: 'cat',
age: '8',
food: 'fish'
}
//etc.
]
},
computed: {
filteredCategory() {
return this.dataToFilter.filter(function (row) {
return row.category === 'dog'
})
.filter(function (row) {
console.log(this.filterKey)
return row.age === '15'
})
},
}
})
</script>
Solution
As @Sadraque_Santos suggested, I used arrow functions.
Code
filteredCategory() {
return this.dataToFilter.filter( r => r.category === 'dog' && r.age === this.filterKey);
}
Also, I have to support IE11 so I just use Babel to compile the code for me.
vue.js computed-properties
asked Nov 21 '18 at 12:57
user9568723
8816
add a comment |
I've some problems with list rendering and filtering the data with computed properties
Instead of hardcoded row.age value, I'd like to use filterKey to filter row.age.
How to archieve this? I just don't get it.
Here's my example:
template:
<button type="button" class="btn btn-t1-secondary" v-on: click="filterKey = '15'">11</button>
<button type="button" class="btn btn-t1-secondary" v-on: click="filterKey = '30'">8</button>
<table>
<thead>
<tr>
<th>Category</th>
<th>Age</th>
<th>Food</th>
</tr>
</thead>
<tbody>
<tr v-for="row in filteredCategory">
<td>{{ row.category }}</td>
<td>{{ row.age }}</td>
<td>{{ row.food }}</td>
</tr>
</tbody>
</table>
JavaScript:
<script>
var app = new Vue({
el: '#app',
data: {
filterKey: '',
filterCategory: '',
dataToFilter: [
{
category: 'dog',
age: '11',
food: 'bone'
},
{
category: 'cat',
age: '8',
food: 'fish'
}
//etc.
]
},
computed: {
filteredCategory() {
return this.dataToFilter.filter(function (row) {
return row.category === 'dog'
})
.filter(function (row) {
console.log(this.filterKey)
return row.age === '15'
})
},
}
})
</script>
Solution
As @Sadraque_Santos suggested, I used arrow functions.
Code
filteredCategory() {
return this.dataToFilter.filter( r => r.category === 'dog' && r.age === this.filterKey);
}
Also, I have to support IE11 so I just use Babel to compile the code for me.
vue.js computed-properties
asked Nov 21 '18 at 12:57
user9568723
8816
I've some problems with list rendering and filtering the data with computed properties
Instead of hardcoded row.age value, I'd like to use filterKey to filter row.age.
How to archieve this? I just don't get it.
Here's my example:
template:
<button type="button" class="btn btn-t1-secondary" v-on: click="filterKey = '15'">11</button>
<button type="button" class="btn btn-t1-secondary" v-on: click="filterKey = '30'">8</button>
<table>
<thead>
<tr>
<th>Category</th>
<th>Age</th>
<th>Food</th>
</tr>
</thead>
<tbody>
<tr v-for="row in filteredCategory">
<td>{{ row.category }}</td>
<td>{{ row.age }}</td>
<td>{{ row.food }}</td>
</tr>
</tbody>
</table>
JavaScript:
<script>
var app = new Vue({
el: '#app',
data: {
filterKey: '',
filterCategory: '',
dataToFilter: [
{
category: 'dog',
age: '11',
food: 'bone'
},
{
category: 'cat',
age: '8',
food: 'fish'
}
//etc.
]
},
computed: {
filteredCategory() {
return this.dataToFilter.filter(function (row) {
return row.category === 'dog'
})
.filter(function (row) {
console.log(this.filterKey)
return row.age === '15'
})
},
}
})
</script>
Solution
As @Sadraque_Santos suggested, I used arrow functions.
Code
filteredCategory() {
return this.dataToFilter.filter( r => r.category === 'dog' && r.age === this.filterKey);
}
Also, I have to support IE11 so I just use Babel to compile the code for me.
vue.js computed-properties
vue.js computed-properties
asked Nov 21 '18 at 12:57
user9568723
8816
asked Nov 21 '18 at 12:57
user9568723
8816
edited Nov 22 '18 at 13:45
asked Nov 21 '18 at 12:57
user9568723
8816
asked Nov 21 '18 at 12:57
user9568723
8816
asked Nov 21 '18 at 12:57
user9568723
8816
8816
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
To have access to this inside a filter, map or another useful method you must learn about arrow functions, they allow you to create a function without the this bound to that object, so instead of using:
filteredCategory () {
return this.dataToFilter.filter(function (row) {
return row.category === 'dog'
})
.filter(function (row) {
console.log(this.filterKey)
return row.age === '15'
})
}
Your code should be like this:
filteredCategory () {
return this.dataToFilter
.filter((row) => row.category === this.filterCategory)
.filter((row) => row.age === this.filterKey)
}
answered Nov 21 '18 at 16:20
Sadraque Santos
9814
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
To have access to this inside a filter, map or another useful method you must learn about arrow functions, they allow you to create a function without the this bound to that object, so instead of using:
filteredCategory () {
return this.dataToFilter.filter(function (row) {
return row.category === 'dog'
})
.filter(function (row) {
console.log(this.filterKey)
return row.age === '15'
})
}
Your code should be like this:
filteredCategory () {
return this.dataToFilter
.filter((row) => row.category === this.filterCategory)
.filter((row) => row.age === this.filterKey)
}
answered Nov 21 '18 at 16:20
Sadraque Santos
9814
add a comment |
To have access to this inside a filter, map or another useful method you must learn about arrow functions, they allow you to create a function without the this bound to that object, so instead of using:
filteredCategory () {
return this.dataToFilter.filter(function (row) {
return row.category === 'dog'
})
.filter(function (row) {
console.log(this.filterKey)
return row.age === '15'
})
}
Your code should be like this:
filteredCategory () {
return this.dataToFilter
.filter((row) => row.category === this.filterCategory)
.filter((row) => row.age === this.filterKey)
}
answered Nov 21 '18 at 16:20
Sadraque Santos
9814
add a comment |
To have access to this inside a filter, map or another useful method you must learn about arrow functions, they allow you to create a function without the this bound to that object, so instead of using:
filteredCategory () {
return this.dataToFilter.filter(function (row) {
return row.category === 'dog'
})
.filter(function (row) {
console.log(this.filterKey)
return row.age === '15'
})
}
Your code should be like this:
filteredCategory () {
return this.dataToFilter
.filter((row) => row.category === this.filterCategory)
.filter((row) => row.age === this.filterKey)
}
answered Nov 21 '18 at 16:20
Sadraque Santos
9814
To have access to this inside a filter, map or another useful method you must learn about arrow functions, they allow you to create a function without the this bound to that object, so instead of using:
filteredCategory () {
return this.dataToFilter.filter(function (row) {
return row.category === 'dog'
})
.filter(function (row) {
console.log(this.filterKey)
return row.age === '15'
})
}
Your code should be like this:
filteredCategory () {
return this.dataToFilter
.filter((row) => row.category === this.filterCategory)
.filter((row) => row.age === this.filterKey)
}
answered Nov 21 '18 at 16:20
Sadraque Santos
9814
edited Nov 22 '18 at 17:16
answered Nov 21 '18 at 16:20
Sadraque Santos
9814
answered Nov 21 '18 at 16:20
Sadraque Santos
9814
answered Nov 21 '18 at 16:20
Sadraque Santos
9814
9814
add a comment |
add a comment |
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