Angular: Efficient ways to Transfer Information using Angular Router

Question

Angular: Efficient ways to Transfer Information using Angular Router

Good day,

Within the app.module.ts:

{path: 'homepage', component: HomepageComponent},

In the xxx.component.ts, we have the following code:

private function() {
    const variable = this.createObject(param);
    console.log(variable);
    this.Router.navigate(['homepage']);
}

Upon examination of the console.log(), we observe that it is an Object structured as follows:

Object: { 
   info1: Object {...},
   info2: Array [...],
   info3: Object{...},
   info4: Array[...]
}

Please help me understand how to pass the "variable" into the new component named "Homepage".

javascript angular typescript

Answer 1

Answer №1

If you're looking to accomplish this goal, there are various methods you can use:

1- Necessitated path parameters:

// Specify the route
{path: 'homepage/:object', component: HomepageComponent}
// Navigation
this.router.navigate(['/homepage', {object: JSON.stringify(nameVariable)}]);
// Retrieve
let object = JSON.parse(this.activatedRoute.snapshot.paramMap.get("object");
console.log(object.information1);

2- Optional path parameters:

// Define the route
{path: 'homepage', component: HomepageComponent}
// Navigation
this.router.navigate(['/homepage', {...nameVariable}]);
// Retrieve
this.activatedRoute.snapshot.paramMap.get("informationX");

3- Query parameters:

// Set up the route
{path: 'homepage', component: HomepageComponent}
// Navigation
this.router.navigate(['/homepage'], {queryParams: nameVariable});
// Retrieve
this.activatedRoute.snapshot.queryParamMap.get("information1");

Each of the aforementioned solutions will disperse your object in the URL.

Another approach is utilizing a shared data attribute established in your SharedService. You can populate this before executing this.router.navigate.

Answer 2

If you're looking to accomplish this goal, there are various methods you can use:

1- Necessitated path parameters:

// Specify the route
{path: 'homepage/:object', component: HomepageComponent}
// Navigation
this.router.navigate(['/homepage', {object: JSON.stringify(nameVariable)}]);
// Retrieve
let object = JSON.parse(this.activatedRoute.snapshot.paramMap.get("object");
console.log(object.information1);

2- Optional path parameters:

// Define the route
{path: 'homepage', component: HomepageComponent}
// Navigation
this.router.navigate(['/homepage', {...nameVariable}]);
// Retrieve
this.activatedRoute.snapshot.paramMap.get("informationX");

3- Query parameters:

// Set up the route
{path: 'homepage', component: HomepageComponent}
// Navigation
this.router.navigate(['/homepage'], {queryParams: nameVariable});
// Retrieve
this.activatedRoute.snapshot.queryParamMap.get("information1");

Each of the aforementioned solutions will disperse your object in the URL.

Another approach is utilizing a shared data attribute established in your SharedService. You can populate this before executing this.router.navigate.

Answer 3

Answer №2

It seems like you're working on something specific, but without more details it's hard to provide a precise solution. However, my suggestion involves utilizing @Output and eventEmitter.

To send data from a child component back to its parent, you can create a variable in the child component decorated with @Output and use a new EventEmitter.

@Output() exampleOutput = new EventEmitter<string>();
    
exampleChildMethod() {
     this.exampleOutput.emit(this.example); //your local variable
}

I hope this explanation is helpful for your situation!

Answer 4

It seems like you're working on something specific, but without more details it's hard to provide a precise solution. However, my suggestion involves utilizing @Output and eventEmitter.

To send data from a child component back to its parent, you can create a variable in the child component decorated with @Output and use a new EventEmitter.

@Output() exampleOutput = new EventEmitter<string>();
    
exampleChildMethod() {
     this.exampleOutput.emit(this.example); //your local variable
}

I hope this explanation is helpful for your situation!

Angular: Efficient ways to Transfer Information using Angular Router

Answer №1

Answer №2

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