video-upscale/dist/once.js

Upscale HTML5 Video using WebGL

/**
 * Returns memoized fn
 */
export const once = (fn) => {
    let called = false;
    let result;
    return (...args) => {
        if (called)
            return result;
        called = true;
        result = fn(...args);
        fn = null;
        return result;
    };
};