Function ofTotal

ofTotal(duration, opts?): (() => number)
Returns a function that returns the percentage of timer completion. Starts when return function is first invoked.
```
import * as Flow from "https://unpkg.com/ixfx/dist/flow.js"
const timer = Flow.ofTotal(1000);

// Call timer() to find out the completion
timer(); // Returns 0..1
```
Note that timer can exceed 1 (100%). To cap it:
```
Flow.ofTotal(1000, { clampValue: true });
```
Takes an Interval for more expressive time:
```
const timer = Flow.ofTotal({ mins: 4 });
```
Is a simple wrapper around relative.
Parameters
- duration: Interval
- opts: {
  clampValue?: boolean;
  wrapValue?: boolean;
  } = {}
  - Optional ReadonlyclampValue?: boolean
  - Optional ReadonlywrapValue?: boolean
Returns (() => number)
- - (): number
  - Returns number
See
- ofTotalTicks - Use ticks instead of time
- hasElapsed - Simple true/false if interval has elapsed