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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | 7x 7x 7x 1x 2x 2x | export type Counter = {
get: () => number;
set: (value: number) => void;
inc: (delta?: number) => void;
dec: (delta?: number) => void;
};
/**
* Creates a {@link Counter} object with an optional `initialValue`, defaults to `0`.
*
* @example
* Create a countdown
* ```ts
* const clickCountdown = counter(10);
*
* const handleClickEvent = () => {
* clickCountdown.dec();
*
* if(isZero(clickCountdown.get())) {
* console.log("0");
* clickCountdown.set(5);
* }
* };
* ```
*
* @param initialValue - the initial value
* @returns the Counter object
*/
export const counter = (initialValue = 0): Counter => {
return {
get() {
return initialValue;
},
set(newValue) {
initialValue = newValue;
},
inc(delta = 1) {
initialValue = initialValue + delta;
},
dec(delta = 1) {
initialValue = initialValue - delta;
},
};
};
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