calling an Angular template function

Question

calling an Angular template function

Can the convert function be called in an Angular template like covert{{item.size}}? If so, what is the correct syntax to use? Thank you.

<mat-cell *matCellDef="let item" fxHide fxShow.gt-xs fxShow.gt-md [matTooltip]="item.size">
                                            <span *ngIf="!item.isFolder">covert{{item.size}}</span>
                                        </mat-cell>

#code converter

convert(x){
    const units = ['bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
     let l = 0, n = parseInt(x, 10) || 0;
     while(n >= 1024 && ++l){
         n = n/1024;
     }
     return(n.toFixed(n < 10 && l > 0 ? 1 : 0) + ' ' + units[l]);
   }

angular typescript

Answer 1

Answer №1

Utilizing Angular's pipes feature is a great way to achieve this task efficiently. By creating a custom pipe, you can centralize your conversion logic for easy reuse throughout your application. This approach eliminates the need to bind such logic to component functions, which can lead to code duplication and maintenance issues.

To create a pipe, you can either use the angular cli command or manually create the pipe file along with its spec.

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

@Pipe({name: 'convert'})
export class ConvertPipe implements PipeTransform {
  transform(input: number): string {
    const units = ['bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
    let level = 0, value = parseInt(input, 10) || 0;
    while(value >= 1024 && ++level){
        value = value/1024;
    }
    return (value.toFixed(value < 10 && level > 0 ? 1 : 0) + ' ' + units[level]);
  }
}

The conversion logic remains unchanged, assuming there are no issues with it. You can now implement this pipe in your components like so:

<mat-cell *matCellDef="let item" fxHide fxShow.gt-xs fxShow.gt-md [matTooltip]="item.size">
        <span *ngIf="!item.isFolder">{{item.size | convert}}</span>
</mat-cell>

Answer 2

Utilizing Angular's pipes feature is a great way to achieve this task efficiently. By creating a custom pipe, you can centralize your conversion logic for easy reuse throughout your application. This approach eliminates the need to bind such logic to component functions, which can lead to code duplication and maintenance issues.

To create a pipe, you can either use the angular cli command or manually create the pipe file along with its spec.

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

@Pipe({name: 'convert'})
export class ConvertPipe implements PipeTransform {
  transform(input: number): string {
    const units = ['bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
    let level = 0, value = parseInt(input, 10) || 0;
    while(value >= 1024 && ++level){
        value = value/1024;
    }
    return (value.toFixed(value < 10 && level > 0 ? 1 : 0) + ' ' + units[level]);
  }
}

The conversion logic remains unchanged, assuming there are no issues with it. You can now implement this pipe in your components like so:

<mat-cell *matCellDef="let item" fxHide fxShow.gt-xs fxShow.gt-md [matTooltip]="item.size">
        <span *ngIf="!item.isFolder">{{item.size | convert}}</span>
</mat-cell>

Answer 3

Answer №2

Give it a shot.

{{ transform(item.dimension) }} or <span>transform(item.dimension)</span>

Answer 4

Give it a shot.

{{ transform(item.dimension) }} or <span>transform(item.dimension)</span>

calling an Angular template function

Answer №1

Answer №2

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