How can I create a custom exception filter in Angular?

How can I create a custom exception filter in Angular?

To create a custom exception filter in Angular, you need to implement the ExceptionFilter interface and define the catch method.

Can you show me a simple example of how to implement it?

Sure! Here's a basic example:

import { ExceptionFilter, Catch, ArgumentsHost, HttpException } from '@nestjs/common';

@Catch(HttpException)
export class HttpExceptionFilter implements ExceptionFilter {
  catch(exception: HttpException, host: ArgumentsHost) {
    const ctx = host.switchToHttp();
    const response = ctx.getResponse();
    const status = exception.getStatus();

    response.status(status).json({
      statusCode: status,
      timestamp: new Date().toISOString(),
      path: ctx.getRequest().url,
    });
  }
}

How do I register this filter in my Angular application?

You can register the filter globally in your main application module like this:

import { Module } from '@nestjs/common';
import { APP_FILTER } from '@nestjs/core';
import { HttpExceptionFilter } from './http-exception.filter';

@Module({
  providers: [{ provide: APP_FILTER, useClass: HttpExceptionFilter }],
})
export class AppModule {}