Ionic 4 how do I receive componentProps?

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You can take those values with Input Component Interaction in the component you will need it, for example:

import { Component } from '@angular/core';
import { ModalController } from '@ionic/angular';
import { TestComponent } from '../test/test.component';

@Component({
  selector: 'app-home',
  templateUrl: 'home.page.html',
  styleUrls: ['home.page.scss']
})
export class HomePage {
  constructor(public modalController: ModalController){}
  async presentModal() {
    const modal = await this.modalController.create({
      component: TestComponent,
      componentProps: { value: 123, otherValue: 234 }
    });
    return await modal.present();
  }
}

In your modal component with Input you can take those params:

import { Component, OnInit, Input } from '@angular/core';

@Component({
  selector: 'app-test',
  templateUrl: './test.component.html',
  styleUrls: ['./test.component.scss']
})
export class TestComponent implements OnInit {
  @Input("value") value;
  @Input() otherValue;
  constructor() { }

  ngOnInit() {
    //print 123
    console.log(this.value);
    //print 234
    console.log(this.otherValue);
  }
}

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