ConcretePage.comAngular Router.navigate() Method
March 03, 2024
Router handles the navigation from one view to another view and to manipulate URL. Find the Router methods to handle navigation.
navigateByUrl() : Navigates to a view using an absolute path.
navigate() : Navigates to a view using the given commands and a starting point.
On this page, we will learn using
navigate() method in detail in our routing application.
Contents
1. navigate()
navigate() method is used to navigate from one view to another view using specified array of commands and a starting point.
Find its method signature.
navigate(
commands: any[],
extras: NavigationExtras = { skipLocationChange: false }
): Promise<boolean>
Parameters :
commands : Accepts the URL fragments using which target URL is created. Static URL can directly be specified.
extras : Optional. It determines how the URL is created. For example, use
relativeTo to create relative URL. By default the value of skipLocationChange is false.
Returns :
navigate() returns a Promise of boolean. If value is true, it means navigation is successful. If value is false, it says that navigation is failed.
1.
navigate() method accepts a command as an array of path segments followed by the parameters for each segments.
2. Using command we can create absolute URL as well as relative URL. If
extras object contains relativeTo property, a relative URL is created.
2. NavigationExtras
AngularNavigationExtras is used to modify the router navigation strategy that
contains the properties as following.
relativeTo : Specifies a root URI.
queryParams : Sets query parameters to URL.
fragment : Sets hash fragments for the URL.
queryParamsHandling : Its values are preserve and merge. When we use preserve, it preserves current parameters. When we use merge, it merges new parameters with current parameters.
preserveFragment : Accepts boolean values. When true, preserves the URL fragment for next navigation.
onSameUrlNavigation : Its values are reload and ignore. On same URL navigation, it can reload or ignore.
skipLocationChange : Accepts boolean values. When true, navigation does not push new state in the history.
replaceUrl : Accepts boolean values. When true, navigation replaces the current state in the history.
state : State defined by us that can be passed to any navigation.
3. Using navigate()
To usenavigate method, inject Router using constructor in component.
1. Passing command array with one URL segment followed by path parameter.
constructor(private router: Router) {}
onButtonClick() {
this.router.navigate(['writer', 101]);
}
/writer/101
this.router.navigate(['writer', 101, "book", 51]);
/writer/101/book/51
4. relativeTo
UsingrelativeTo, we can set a root URI and then URL segments passed as command creates relative URL.
Find the code snippet to use
relativeTo as extras.
constructor(private router: Router, private route: ActivatedRoute) {}
onButtonClick() {
this.router.navigate(['state', 11, "city", 21], {relativeTo: this.route});
}
/country/state/11/city/21
5. queryParams
queryParams sets query parameter to URL.
this.router.navigate(['college', 10, "student", 11],
{
queryParams: { name: 'Mukesh', age: 15, city: 'Varanasi' },
relativeTo: this.route
});
/education/college/10/student/11?name=Mukesh&age=15&city=Varanasi
6. queryParamsHandling
queryParamsHandling decides how to handle query parameters in the next navigation. It can have two values.
preserve : Preserve current parameters and discard the new parameters.
merge : Merge new parameters with current parameters.
Suppose our current URL with parameters is as below.
/company/?cid=101
this.router.navigate(['team', 15],
{
queryParams: { empname: 'Mukesh', age: 25 },
relativeTo: this.route,
queryParamsHandling: "merge"
});
/company/team/15?cid=101&empname=Mukesh&age=25
this.router.navigate(['team', 15],
{
queryParams: { empname: 'Mukesh', age: 25 },
relativeTo: this.route,
queryParamsHandling: "preserve"
});
/company/team/15?cid=101
7. fragment
fragment sets the hash fragment for the URL.
this.router.navigate(['book', 3, 'page', 10],
{
fragment: 'bottom'
});
/book/3/page/10#bottom
8. preserveFragment
preserveFragment is a boolean property. When its value is true, URL fragment is preserved for next URL.
Suppose current URL is as below.
/worldnews#top
this.router.navigate(['political'],
{
preserveFragment: true,
relativeTo: this.route
});
/worldnews/political#top
9. skipLocationChange
skipLocationChange is a boolean property and its default value is false. When we navigate to new URL, that URL is displayed in browser. When its value is true, then navigate() method navigates to new URL silently and location change is skipped, its means browser URL will not change.
this.router.navigate(['userdetail'],
{
skipLocationChange: true
});
10. replaceUrl
replaceUrl is boolean property. When its value is true, application navigates to the new URL by replacing the current state in the history.
this.router.navigate(['userdetail', 11],
{
replaceUrl: true
});
11. state
Usingstate, we can send data from one path to another path.
this.router.navigate(['personList'],
{
state: { id: 101, name: "Mohit" },
});
Router.lastSuccessfulNavigation property.
constructor(private router: Router) { }
ngOnInit() {
const obj = this.router.lastSuccessfulNavigation?.extras.state;
console.log(obj);
}
{ id: 101, name: "Mohit" }
