@bi8/am-dyn-form/esm2015/app/modules/am-dyn-form/dyn-form-group.js

ng update @angular/cli yarn add @angular/cli

import { FormGroup } from "@angular/forms";
import { filter, tap } from "rxjs/operators";
import { pipeFromArray } from 'rxjs/internal/util/pipe';
export class DynFormGroup extends FormGroup {
    constructor(options = {}, controls) {
        super(controls);
        this.config = {};
        if (options) {
            this.key = options.key || '';
            this.dir = options.dir || '';
        }
    }
    addSlaveObserver(master, slave, options) {
        let masterField = this.get(master);
        let slaveField = this.get(slave);
        if (!options) {
            options = { disable: true, reset: true, apply: true };
        }
        else {
            if (options.reset === undefined) {
                options.reset = true;
            }
            if (options.disable === undefined) {
                options.disable = true;
            }
            if (options.apply === undefined) {
                options.apply = options.disable;
            }
        }
        let ops = [];
        if (options.reset) {
            ops.push(tap(() => slaveField.reset()));
        }
        if (options.disable) {
            ops.push(tap(() => slaveField.disable()));
            if (options.apply) {
                slaveField.disable({ onlySelf: true });
            }
        }
        ops.push(filter((value) => {
            if (!value) {
                return false;
            }
            else {
                return value instanceof Array ? value.length > 0 : true;
            }
        }));
        if (options.disable) {
            ops.push(tap(() => slaveField.enable()));
        }
        if (options.ops) {
            ops.push(...options.ops);
        }
        return masterField.valueChanges.pipe(pipeFromArray([...ops]));
    }
}
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