search bar in typescript

To create a search bar in TypeScript using Angular, you can use reactive forms to filter data in real-time. Here's an example implementation:

Create a reactive form in your component:


index.ts
import { FormGroup, FormControl } from '@angular/forms';

export class MyComponent {
  searchForm = new FormGroup({
    searchQuery: new FormControl('')
  });
}
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Bind the form to an input field in your template:


<form [formGroup]="searchForm">
  <input type="text" formControlName="searchQuery" placeholder="Search...">
</form>
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Use the valueChanges observable on the form control to filter data, using a debounceTime to avoid excessive filtering:


index.ts
import { debounceTime } from 'rxjs/operators';

export class MyComponent {
  // assume data is an array of objects to filter
  data = [...];

  ngOnInit() {
    this.searchForm.get('searchQuery').valueChanges
      .pipe(debounceTime(300)) // debounce for 300ms to avoid excessive filtering
      .subscribe(searchValue => {
        this.filterData(searchValue);
      });
  }

  filterData(searchValue: string) {
    // filter data array based on searchValue
    // e.g. using Array.filter() and String.includes()
    this.data = this.data.filter(obj => obj.name.includes(searchValue));
  }
}
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Display the filtered data in your template:


<div *ngFor="let obj of data">
  {{ obj.name }}
</div>
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This is a basic example of a search bar in TypeScript using Angular and reactive forms. You can customize this implementation to fit your specific use case by modifying the filterData() method to filter data in different ways, or by modifying the template to display the filtered data in a different format.

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