vanillajs-browser-helpers/elementData.mjs

Collection of convenience code snippets (helpers) that aims to make it a little easier to work with vanilla JS in the browser

let _cache = new WeakMap();
export const resetCache = () => { _cache = new WeakMap(); };
export default function elmData(elm, key, data) {
    let elmCache = _cache.get(elm);
    if (!key) {
        return elmCache;
    }
    if (data !== undefined) {
        if (!elmCache) {
            elmCache = {};
            _cache.set(elm, elmCache);
        }
        elmCache[key] = data;
    }
    return elmCache?.[key];
}