A simple example how to load and to parse angular.json in RAW mode

readAngularWorkspaceRAW.ts

import * as path from 'path';
import { from } from 'rxjs';
import { filter, tap } from 'rxjs/operators';

const angularFile = require(path.join(__dirname, 'angular.json'));

console.log('Start: do something only on my libraries');

from(Object.keys(angularFile.projects)).pipe(
    filter(key => angularFile.projects[key].projectType === 'library'),
    tap((projectKey: string) => {
        // DO something on library
    })
).subscribe({
    complete() {
        console.log('End: task completed');
    }
});