Avoid Multiple Function Calls in Angular Templates with pipeFunction

Introduction

Angular templates often require transforming data before displaying it in the UI. While Angular provides built-in pipes for common transformations, developers frequently need custom pipes for specific formatting needs. However, creating a new custom pipe for every transformation can lead to unnecessary boilerplate.

Enter pipeFunction—a powerful and flexible solution that allows you to use component functions as pipes, eliminating the need for redundant custom pipes and preventing multiple function calls in templates. In this article, we'll explore the implementation, use cases, and benefits of this approach.

The pipeFunction Implementation

The pipeFunction is a standalone Angular pipe that dynamically applies a function to a given value, optionally binding it to a context. Below is the full implementation:

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

@Pipe({
    name: 'pipeFunction',
    standalone: true,
})
export class PipeFunction implements PipeTransform {
    public transform<T>(value: any, handler: (value: any) => T, context?: any): T {
        if (context) {
            return handler.call(context, value);
        }
        return handler(value)…