JAVASCRIPT

query parameters

import React, { useEffect, useState } from "react";
import { useLocation } from "react-router-dom";

function CheckoutDetails() {
  const location = useLocation();
  const [amountValue, setAmountValue] = useState(1);

  // function to get query params using URLSearchParams
  useEffect(() => {
    const searchParams = new URLSearchParams(location.search);
    if (searchParams.has("amount")) {
      const amount = searchParams.get("amount");
      setAmountValue(parseInt(amount, 10));
    } else {
      setAmountValue(1);
    }
  }, [location]);

  return (
  	<p>Amount: {amountValue}</p>
  )
  

query params

constructor(private router: Router) { }

public myMethodChangingQueryParams() {
  const queryParams: Params = { myParam: 'myNewValue' };

  this.router.navigate(
    [], 
    {
      relativeTo: activatedRoute,
      queryParams: queryParams, 
      queryParamsHandling: 'merge', // remove to replace all query params by provided
    });
}

query params

      
        content_copy
      
      <a [routerLink]="['/user/bob']" [queryParams]="{debug: true}" queryParamsHandling="merge">
  link to user component
</a>