Angular2: the setTimeout function is executed just a single time

Currently, I am working on implementing a feature in Angular2 that relies on the use of setTimeout.

This is a snippet of my code:

  public ngAfterViewInit(): void {
    this.authenticate_loop();
  }

  private authenticate_loop() {
    setTimeout (() => {
      console.log("Hello from setTimeout");
    }, 500)
  }

Although setTimeout is triggered by ngAfterViewInit, the loop only runs once, displaying "Hello from setTimeout" just one time.

Inquiry: What modifications can be made to enable setTimeout to function properly?

Answer №1

 function verify_authentication() {
    setInterval(() => {
      console.log("Greetings from the forever loop");
    }, 500)
 }

If you want a code block to only execute once, you can use setTimeout, otherwise it will keep running on intervals.

Answer №2

Edit: To provide more clarity regarding different versions of Angular:

In Angular2, there is no longer a requirement to use $timeout or $interval. Therefore, for the question posed here, using setInterval is the correct approach.

For those interested in the original response (specific to Angular1), please refer to the following:

Utilize $interval within an angular.js application.

If you need to use setTimeout in another context within an angular.js application, it is recommended to utilize the $timeout service.

$timeout and $interval offer the advantage of keeping your scope updated, which setTimeout / setInterval do not provide.

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