@exadel/esl/modules/esl-utils/misc/object/copy.js

Exadel Smart Library (ESL) is the lightweight custom elements library that provide a set of super-flexible components

/** Makes a plain copy of obj with properties satisfying the predicate
 * If no predicate provided copies all own properties */
export function copy(obj, predicate = () => true) {
    const result = Object.assign({}, obj || {});
    Object.keys(result).forEach((key) => {
        (!predicate(key, result[key])) && delete result[key];
    });
    return result;
}
/** Makes a flat copy without undefined keys */
export function copyDefinedKeys(obj) {
    return copy(obj || {}, (key, value) => value !== void 0);
}
/** Omits copying provided properties from object */
export function omit(obj, keys) {
    return copy(obj, (key) => !keys.includes(key));
}
/** Picks only provided properties from object */
export function pick(obj, keys) {
    const result = {};
    if (!obj)
        return result;
    for (const key of keys) {
        if (key in obj)
            result[key] = obj[key];
    }
    return result;
}