ionic-framework/demos/searchbar/index.ts

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

import { ionicBootstrap } from 'ionic-angular';


@Component({
  templateUrl: 'main.html'
})
class ApiDemoPage {
  items: Array<string>;

  ngOnInit() {
    this.setItems();
  }

  setItems() {
    this.items = ['Orange', 'Banana', 'Pear', 'Tomato', 'Grape', 'Apple', 'Cherries', 'Cranberries', 'Raspberries', 'Strawberries', 'Watermelon'];
  }

  filterItems(ev) {
    this.setItems();
    let val = ev.target.value;

    if (val && val.trim() !== '') {
      this.items = this.items.filter(function(item) {
        return item.toLowerCase().includes(val.toLowerCase());
      });
    }
  }
}


@Component({
  template: '<ion-nav [root]="root"></ion-nav>'
})
class ApiDemoApp {
  root = ApiDemoPage;
}

ionicBootstrap(ApiDemoApp);