get query param javascript
const urlParams = new URLSearchParams(window.location.search);
const myParam = urlParams.get('myParam');get query param javascript
const urlParams = new URLSearchParams(window.location.search);
const myParam = urlParams.get('myParam');difference between req.query and req.params
req.params contains route parameters
(in the path portion of the URL),
and req.query contains the URL query parameters
(after the ? in the URL).
You can also use req.param(name) to look up a parameter in both places
(as well as req.body),
but this method is now deprecated.get query params
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 parameters
Query Parameter
represented as key value pair right after the ?
https://www.google.com/search?q=iloveyou
usually used to filter the result
GET /api/spartacus/search?gender=Male&nameContains=li
if we have more than one query parameter
& is used to connect them
Also there is a Path Parameter|variable
/api/spartans/{id} /api/spartans/:id
It's used to identify single resource amonth list of resources
in above example
the id is the path parameter to identify single spartanquery 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>Copyright © 2021 Codeinu
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