by Sai gowtham

How to get query params from a URL in Angular

In this tutorial, we are going to learn about how to get the query params data from a current URL in an angular app.

Getting the query params

To get the query params from an URL, we can use the ActivatedRoute interface this.route.snapshot.queryParams object.

Example:

Consider, we have the following route with query parameters in our angular app.

localhost:4500/products?name=book

Now, we can access the name query parameter value inside a products.component.ts file like this.

products.component.ts
import { Component, OnInit } from "@angular/core";
import { ActivatedRoute } from "@angular/router";
@Component({
  selector: "app-products",
  templateUrl: './products.component.html',
  styleUrls: ['./products.component.css']
})
export class ProductsComponent implements OnInit {

  constructor(private route: ActivatedRoute) {  }

  ngOnInit(){
    console.log(this.route.snapshot.queryParams.name); // book  }
}

Note: The snapshot stores the query params data at the time of component is initialized.

If the query params data in the url is changed but the component data is not updated with the changes, you need to use this.route.queryParams observable by subscribing to it.

products.component.ts
import { Component, OnInit } from "@angular/core";
import { ActivatedRoute } from "@angular/router";
@Component({
  selector: "app-products",
  templateUrl: './products.component.html',
  styleUrls: ['./products.component.css']
})
export class ProductsComponent implements OnInit {

  constructor(private route: ActivatedRoute) {  }

  ngOnInit() {
    this.route.queryParams.subscribe(params => {      console.log(params.name);    });  }
}

If you have multiple query parameters in your URL.

localhost:4500/products?name=book&id=22

you can access it like this.

products.component.ts
import { Component, OnInit } from "@angular/core";
import { ActivatedRoute } from "@angular/router";
@Component({
  selector: "app-products",
  templateUrl: './products.component.html',
  styleUrls: ['./products.component.css']
})
export class ProductsComponent implements OnInit {

  constructor(private route: ActivatedRoute) {  }

  ngOnInit() {
    this.route.queryParams.subscribe(params => {
      console.log(params.name); // book      console.log(params.id); // 22    });
  }
}

Css Tutorials & Demos

How rotate an image continuously in CSS

In this demo, we are going to learn about how to rotate an image continuously using the css animations.

How to create a Instagram login Page

In this demo, i will show you how to create a instagram login page using html and css.

How to create a pulse animation in CSS

In this demo, i will show you how to create a pulse animation using css.

Creating a snowfall animation using css and JavaScript

In this demo, i will show you how to create a snow fall animation using css and JavaScript.

Top Udemy Courses

JavaScript - The Complete Guide 2021 (Beginner + Advanced)
JavaScript - The Complete Guide 2021 (Beginner + Advanced)
64,026 students enrolled
52 hours of video content
View Course
React - The Complete Guide (incl Hooks, React Router, Redux)
React - The Complete Guide (incl Hooks, React Router, Redux)
284,472 students enrolled
40 hours of video content
View Course
Vue - The Complete Guide (w/ Router, Vuex, Composition API)
Vue - The Complete Guide (w/ Router, Vuex, Composition API)
152,857 students enrolled
48.5 hours of video content
View Course