@meta2d/core/src/utils/debounce.js

@meta2d/core: Powerful, Beautiful, Simple, Open - Web-Based 2D At Its Best .

const debounces = new WeakMap();
const throttles = new WeakMap();
export function debounce(fn, delay, params) {
    let cache = debounces.get(fn);
    if (cache) {
        clearTimeout(cache.timer);
    }
    else {
        cache = {};
        debounces.set(fn, cache);
    }
    return new Promise((resolve, reject) => {
        cache.timer = setTimeout(async () => {
            resolve(await fn(params));
            debounces.delete(fn);
        }, delay);
    });
}
export async function throttle(fn, delay, params) {
    const now = new Date().getTime();
    const start = debounces.get(fn);
    throttles.set(fn, now);
    if (start && now - start < delay) {
        return;
    }
    return await fn(params);
}
export class InstanceDebouncer {
    static instances = new WeakMap();
    static debounce(instance, methodName, wait = 300) {
        const key = Symbol(`${instance.constructor.name}.${methodName}`);
        if (!this.instances.has(instance)) {
            this.instances.set(instance, {});
        }
        const instanceData = this.instances.get(instance);
        return (...args) => {
            if (instanceData[key]) {
                clearTimeout(instanceData[key]);
            }
            instanceData[key] = setTimeout(() => {
                instance[methodName](...args);
                delete instanceData[key];
            }, wait);
        };
    }
}
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