Filtering JSON data with Angular 4 input range feature

Question

Filtering JSON data with Angular 4 input range feature

Hello there, I'm currently working on a search pipe in Angular 4 to filter company team sizes from JSON data using a range input between 0 and 100. However, I'm facing an issue with the range filter as I am relatively new to TypeScript and Angular 4. Any assistance would be greatly appreciated as I've tried some basic code but seem to have trouble grasping the logic.

Here is the Range Pipe -

@Pipe({
  name: 'range'
})
export class CheckboxPipe implements PipeTransform {

  transform(value: any, args?: any): any {
    console.log('args', args);
    return args
            ? value.filter(sal => { return sal.team })
            : value;
  }

}

Below is the Range Input box -

0 <input type="range" min="0" max="100" 
        [(ngModel)]="team" name="team" /> 100

And here is the list being filtered -

<div *ngFor="let joblist of jobList | range: team">
    {{joblist.team}}
</div>

angular typescript

Answer 1

Answer №1

Make a modification to your transform() function like this,

transform(value: any, team?: any): any {
return (team || team === 0)
        ? value.filter(sal => { return sal.team })
        : value;
}

After making the change, test if it resolves the issue at hand.

UPDATE:

Although not entirely certain, there might be an issue with ngModel not receiving the correct value due to the use of input with type set as range. Suggesting an alternative approach below:

0 <input #rangeInput type="range" min="0" max="100" [(ngModel)]="team" name="team" /> 100
<div *ngFor="let joblist of jobList | range: rangeInput?.value">
 {{joblist.team}}
</div>

Here, I introduced a template reference variable #rangeInput to pass the value of that control to the pipe.

If the above step doesn't yield results, consider changing the team === 0 check in the return statement within the transform() to team === '0', treating the value as a string instead of a number.

Answer 2

Make a modification to your transform() function like this,

transform(value: any, team?: any): any {
return (team || team === 0)
        ? value.filter(sal => { return sal.team })
        : value;
}

After making the change, test if it resolves the issue at hand.

UPDATE:

Although not entirely certain, there might be an issue with ngModel not receiving the correct value due to the use of input with type set as range. Suggesting an alternative approach below:

0 <input #rangeInput type="range" min="0" max="100" [(ngModel)]="team" name="team" /> 100
<div *ngFor="let joblist of jobList | range: rangeInput?.value">
 {{joblist.team}}
</div>

Here, I introduced a template reference variable #rangeInput to pass the value of that control to the pipe.

If the above step doesn't yield results, consider changing the team === 0 check in the return statement within the transform() to team === '0', treating the value as a string instead of a number.

Answer 3

Answer №2

Hey there, I successfully tackled the range filter issue and found it to be quite manageable. Let me share my solution with you -

Firstly, here is the custom Range Pipe implementation -

import { Pipe, PipeTransform } from '@angular/core';

@Pipe({
  name: 'range'
})
export class RangePipe implements PipeTransform {

  transform(teamVal: any[], teamFil?: number): any {
        console.log('teamFil', teamFil);
        return teamFil
         ? teamVal.filter(person => person.team >= teamFil) 
         : teamVal;
    }

}

Next, let's look at the Range slider component -

<span>0</span>
<input type="range" min="0" max="100" [(ngModel)]="sliderValue" />
<span>100</span>

The current value of the slider in the component is stored in a property called sliderValue -

sliderValue: number = 0;

Now, we can use this slider to filter data based on its value within the HTML template -

<ul>
    <li *ngFor="let joblists of jobList | range: sliderValue">{{joblists.team}}</li>
</ul>

Answer 4

Hey there, I successfully tackled the range filter issue and found it to be quite manageable. Let me share my solution with you -

Firstly, here is the custom Range Pipe implementation -

import { Pipe, PipeTransform } from '@angular/core';

@Pipe({
  name: 'range'
})
export class RangePipe implements PipeTransform {

  transform(teamVal: any[], teamFil?: number): any {
        console.log('teamFil', teamFil);
        return teamFil
         ? teamVal.filter(person => person.team >= teamFil) 
         : teamVal;
    }

}

Next, let's look at the Range slider component -

<span>0</span>
<input type="range" min="0" max="100" [(ngModel)]="sliderValue" />
<span>100</span>

The current value of the slider in the component is stored in a property called sliderValue -

sliderValue: number = 0;

Now, we can use this slider to filter data based on its value within the HTML template -

<ul>
    <li *ngFor="let joblists of jobList | range: sliderValue">{{joblists.team}}</li>
</ul>

Filtering JSON data with Angular 4 input range feature

Answer №1

Answer №2

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