ion-loading

import { Component } from '@angular/core';
import { LoadingController } from '@ionic/angular';

@Component({
  selector: 'loading-example',
  templateUrl: 'loading-example.html',
  styleUrls: ['./loading-example.css']
})
export class LoadingExample {
  constructor(public loadingController: LoadingController) {}

  async presentLoading() {
    const loading = await this.loadingController.create({
      message: 'Hellooo',
      duration: 2000
    });
    await loading.present();

    const { role, data } = await loading.onDidDismiss();

    console.log('Loading dismissed!');
  }

  async presentLoadingWithOptions() {
    const loading = await this.loadingController.create({
      spinner: null,
      duration: 5000,
      message: 'Please wait...',
      translucent: true,
      cssClass: 'custom-class custom-loading'
    });
    return await loading.present();
  }
}

async function presentLoading() {
  const loading = document.createElement('ion-loading');
  loading.message: 'Hellooo',
  loading.duration: 2000;

  document.body.appendChild(loading);
  await loading.present();

  const { role, data } = await loading.onDidDismiss();

  console.log('Loading dismissed!');
}

function presentLoadingWithOptions() {
  const loading = document.createElement('ion-loading');
  loading.spinner = null;
  loading.duration = 5000;
  loading.message = 'Please wait...';
  loading.translucent = true;
  loading.cssClass = 'custom-class custom-loading';

  document.body.appendChild(loading);
  return loading.present();
}

import React, { useState } from 'react';
import { IonLoading, IonButton, IonContent } from '@ionic/react';

export const LoadingExample: React.FC = () => {
  const [showLoading, setShowLoading] = useState(true);

  setTimeout(() => {
    setShowLoading(false);
  }, 2000);

  return (
    <IonContent>
      <IonButton onClick={() => setShowLoading(true)}>Show Loading</IonButton>
      <IonLoading
        isOpen={showLoading}
        onDidDismiss={() => setShowLoading(false)}
        message={'Loading...'}
        duration={5000}
      />
    </IonContent>
  );
};

<template>
  <IonVuePage :title="'Loading'">
    <ion-button @click="presentLoading">Show Loading</ion-button>
    <br />
    <ion-button @click="presentLoadingWithOptions">Show Loading</ion-button>
  </IonVuePage>
</template>

<script>
export default {
  props: {
    timeout: { type: Number, default: 1000 },
  },
  methods: {
    presentLoading() {
      return this.$ionic.loadingController
        .create({
          message: 'Loading',
          duration: this.timeout,
        })
        .then(l => {
          setTimeout(function() {
            l.dismiss()
          }, this.timeout)
          return l.present()
        })
    },
    presentLoadingWithOptions() {
      return this.$ionic.loadingController
        .create({
          spinner: null,
          duration: this.timeout,
          message: 'Please wait...',
          translucent: true,
          cssClass: 'custom-class custom-loading',
        })
        .then(l => {
          setTimeout(function() {
            l.dismiss()
          }, this.timeout)
          return l.present()
        })
    },
  },
}
</script>