Is there a way to trigger the ngOnInit() function in Angular 2 for a second time

Question

Is there a way to trigger the ngOnInit() function in Angular 2 for a second time

I need help understanding how to re-trigger the ngOnInit() function when calling another method. Can you provide guidance on this in the following code snippet?

ngOnInit(): void {
  this.route.params.subscribe((params: Params) => {
    this.model = this.userData;
  });
}

update() {
  this.loading = true;
  this.userService.update(this.model).subscribe(
    (data) => {
      alert('Update successful');
    },
    (error) => {
      alert('Not updated');
      this.loading = false;
    },
  );
  this.user_data();
}

angular angular-lifecycle-hooks

Answer 1

Answer №1

From my perspective, there are two possible choices:

Option 1: Invoking ngOnInit() from a different function scope. However, I would advise against this method as ngOnInitis a core Angular method that is part of the OnInit Interface.

    public ngOnInit() {
          this.route.params.subscribe((params: Params) => {
          this.model=this.userData;
      });      
    }
    
    update() {
           this.ngOnInit();
    }

Option 2: Divide your functionality into another function, utilize ngOnInit to call it, and then any request can be triggered from anywhere by invoking the function in this manner: this.<MethodName>();.

    public ngOnInit() {
          this.getRouteData();
    }
    
    update() {
           this.getRouteData(); 
    }

    getRouteData() {
      this.route.params.subscribe((params: Params) => {
          this.model=this.userData;
      }); 
    }

Answer 2

From my perspective, there are two possible choices:

Option 1: Invoking ngOnInit() from a different function scope. However, I would advise against this method as ngOnInitis a core Angular method that is part of the OnInit Interface.

    public ngOnInit() {
          this.route.params.subscribe((params: Params) => {
          this.model=this.userData;
      });      
    }
    
    update() {
           this.ngOnInit();
    }

Option 2: Divide your functionality into another function, utilize ngOnInit to call it, and then any request can be triggered from anywhere by invoking the function in this manner: this.<MethodName>();.

    public ngOnInit() {
          this.getRouteData();
    }
    
    update() {
           this.getRouteData(); 
    }

    getRouteData() {
      this.route.params.subscribe((params: Params) => {
          this.model=this.userData;
      }); 
    }

Answer 3

Answer №2

To ensure that ngOnInit() is triggered whenever the query parameter is modified, you can implement the following solution:

import { Router } from '@angular/router';
constructor(private router: Router) {
    this.router.routeReuseStrategy.shouldReuseRoute = () => false;
}

Answer 4

To ensure that ngOnInit() is triggered whenever the query parameter is modified, you can implement the following solution:

import { Router } from '@angular/router';
constructor(private router: Router) {
    this.router.routeReuseStrategy.shouldReuseRoute = () => false;
}

Answer 5

Answer №3

ngOnInit is executed once the component is initialized, allowing you to create a function and call it again. Below is an example of how this can be implemented.

ngOnInit(): void {
    this.callFunction();
}    

update() {
    this.callFunction();
    // additional code
}

private callFunction(){
   // logic here
}

Answer 6

ngOnInit is executed once the component is initialized, allowing you to create a function and call it again. Below is an example of how this can be implemented.

ngOnInit(): void {
    this.callFunction();
}    

update() {
    this.callFunction();
    // additional code
}

private callFunction(){
   // logic here
}

Answer 7

Answer №4

There is no need to call ngOnInit again, so the question arises: what exactly are you trying to achieve? Are you encountering difficulties in retrieving the routing parameter?

 ngOnInit(): void {
      this.route.params.subscribe((params: Params) => {
        this.model=this.userData;
  });

The code within the subscribe block above will AUTOMATICALLY be re-executed every time the route parameters change. Therefore, there is no requirement to manually invoke ngOnInit again.

Answer 8

There is no need to call ngOnInit again, so the question arises: what exactly are you trying to achieve? Are you encountering difficulties in retrieving the routing parameter?

 ngOnInit(): void {
      this.route.params.subscribe((params: Params) => {
        this.model=this.userData;
  });

The code within the subscribe block above will AUTOMATICALLY be re-executed every time the route parameters change. Therefore, there is no requirement to manually invoke ngOnInit again.

Answer 9

Answer №5

It functions like a charm...

initializeComponent() {}

rerunMethod() { this.initializeComponent(); }

This technique has served me well for refreshing my content, and I've never encountered any issues.

Answer 10

It functions like a charm...

initializeComponent() {}

rerunMethod() { this.initializeComponent(); }

This technique has served me well for refreshing my content, and I've never encountered any issues.

Is there a way to trigger the ngOnInit() function in Angular 2 for a second time

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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