👀 Views: 83 💬 Answers: 1 📅 Created: 2025-06-12

angular reactive-forms debounce TypeScript

I'm upgrading from an older version and I've spent hours debugging this and I've tried everything I can think of but I'm confused about Quick question that's been bugging me - I'm trying to implement a search feature in my Angular 15 application using Reactive Forms with a debounce time on the input field to optimize API calls..... However, I'm encountering an issue where the input value doesn't seem to update correctly after the specified debounce time, which leads to unnecessary API calls being made with stale input values. I'm using `FormBuilder` to create my form and I've set up the debounce time like this: ```typescript import { Component, OnInit } from '@angular/core'; import { FormBuilder, FormGroup } from '@angular/forms'; import { debounceTime } from 'rxjs/operators'; @Component({ selector: 'app-search', template: `<input [formControl]='searchControl' placeholder='Search...'/>` }) export class SearchComponent implements OnInit { searchForm: FormGroup; searchControl = this.fb.control(''); constructor(private fb: FormBuilder) {} ngOnInit() { this.searchControl.valueChanges.pipe( debounceTime(300) ).subscribe(value => { console.log('Search Value:', value); this.performSearch(value); }); } performSearch(value: string) { // Call your API with the search value } } ``` I expect the `performSearch` method to be called after 300ms of inactivity in the input. However, it seems to be firing multiple times, and sometimes logging old values instead of the latest input. I’ve confirmed that the debounce operator is set up correctly, and I even tried using the `distinctUntilChanged` operator to prevent duplicate calls: ```typescript import { distinctUntilChanged } from 'rxjs/operators'; ``` But I’m still seeing the same issue. I've also made sure that no other subscriptions are interfering with the input value. Could there be something I'm missing in the implementation? Is there a known issue with Reactive Forms and debouncing in Angular 15 that I should be aware of? Any insights or suggestions would be greatly appreciated! Any help would be greatly appreciated! Any pointers in the right direction? I'd really appreciate any guidance on this. This is part of a larger REST API I'm building. I appreciate any insights! I'm working in a Ubuntu 20.04 environment. I'd really appreciate any guidance on this. I'm coming from a different tech stack and learning Typescript. Any help would be greatly appreciated!