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bb9870176f
feat(utils.ts): add Watchable class to provide a generic watchable object with getter, setter, and watcher functionality
34 lines
700 B
TypeScript
34 lines
700 B
TypeScript
export function increment(num: number, length: number): number {
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return (num + 1) % length
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}
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export function decrement(num: number, length: number): number {
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return (num + length - 1) % length
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}
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export function expand(num: number): string {
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return ('0000' + num.toString()).slice(-4)
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}
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export function isMobile(): boolean {
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return window.matchMedia('(hover: none)').matches
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}
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export class Watchable<T> {
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constructor(private obj: T) {}
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private watchers: (() => void)[] = []
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get(): T {
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return this.obj
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}
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set(e: T): void {
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this.obj = e
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this.watchers.forEach((watcher) => watcher())
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}
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addWatcher(watcher: () => void): void {
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this.watchers.push(watcher)
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}
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}
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