employing flush for lodash's throttle wrapper

Question

employing flush for lodash's throttle wrapper

When using TypeScript with JavaScript and Angular:

I am trying to use the throttle decorator from lodash to limit an API call while a user is navigating around the page, ensuring that it fires before they leave the site.

In my TypeScript constructor, I have

window.addEventListener('beforeunload', () => this.onUnload());

with the onUnload() function being defined as

onUnload() {
    this.thisIsTheThrottledFunction.flush;
}

However, I am encountering the error message "Property 'flush' does not exist on type '() => Promise'."

The function's .flush method that I am attempting to access is the throttled version of another function. Despite the successful throttling of the function, I still cannot access the .flush method. What is the best way to solve this issue?

javascript typescript lodash

Answer 1

Answer №1

To troubleshoot this issue, it is important to check the value of `this` in your code. One way to solve this problem is by utilizing the `bind` method to set the object's `this` value for the `onUnload` function. You can achieve this by adding `this.onUnload = this.onUnload.bind(this)` in your constructor. Alternatively, you can use a shorthand syntax within your class definition like `onUnload = () => { ... }`. These methods ensure that the method is attached to the instance rather than just being part of the prototype. Another option is to directly pass the bound function to your event listener like so:

window.addEventListener('beforeunload', this.onUnload.bind(this));

Answer 2

To troubleshoot this issue, it is important to check the value of `this` in your code. One way to solve this problem is by utilizing the `bind` method to set the object's `this` value for the `onUnload` function. You can achieve this by adding `this.onUnload = this.onUnload.bind(this)` in your constructor. Alternatively, you can use a shorthand syntax within your class definition like `onUnload = () => { ... }`. These methods ensure that the method is attached to the instance rather than just being part of the prototype. Another option is to directly pass the bound function to your event listener like so:

window.addEventListener('beforeunload', this.onUnload.bind(this));

employing flush for lodash's throttle wrapper

Answer №1

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