# Background task

An simple function wrapper around
[requestIdleCallback](https://developer.mozilla.org/en-US/docs/Web/API/Window/requestIdleCallback)
that queues tasks and runs them sequentially.

The main purpose is to be able to run maintainance functions that are not a good fit for a web
worker context (i.e. methods that require the DOM).

# Usage

Wrap your function.

```
const task = backgroundTask(() => {
	// do stuff
});

task().then(result => {
	// task has finished.
});
```

Call `task` as you would any other async function. The return value is a promise for when the background task completes.

Calling a task multiple times will queue the passed parameters and execute the task sequentially the same number of times.