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How do you configure dynamic base href in Angular builds for different environments?

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01

Understand the problem

Describe setting base href dynamically during bootstrap or build.

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03

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You can set base href in angular.json using the --base-href flag during build, or provide the APP_BASE_HREF token dynamically in the bootstrap providers array, resolving the base path dynamically from window/location parameters.

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04

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Resolving base href dynamically from URL parameters
import { bootstrapApplication } from '@angular/platform-browser';
import { APP_BASE_HREF } from '@angular/common';
import { Component } from '@angular/core';

@Component({ selector: 'app-root', template: '<h1>Base href Demo</h1>' })
export class AppComponent {}

bootstrapApplication(AppComponent, {
  providers: [
    {
      provide: APP_BASE_HREF,
      useFactory: () => {
        const path = window.location.pathname.split('/')[1];
        return path ? '/' + path + '/' : '/';
      }
    }
  ]
});
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