How to update value to specific page by using URL?

We can update value to cart page and PLP quick view page by using window.location.href method.

var url = window.location.href;
                        console.log('urll',url)
                        if (url.indexOf("fcs-forms") > -1) {
 this.model.set('quantity',quantityset)
                            }
                            else if(url.indexOf("cart") > -1){
                                console.log('cart enter')
                                this.model.set('quantity',quantityset)     
                            }