dom-factory/src/util/assign.js

Enhance HTML elements using plain JavaScript objects.

/**
 * Assign descriptors
 * @param  {Object}    target
 * @param  {...Object} sources
 * @return {Object}
 */
export const assign = (target, ...sources) => {
  sources.forEach(source => {
    if (!source) {
      return
    }
    let descriptors = Object.keys(source).reduce((descriptors, key) => {
      descriptors[key] = Object.getOwnPropertyDescriptor(source, key)
      return descriptors
    }, {})
    Object.getOwnPropertySymbols(source).forEach(sym => {
      let descriptor = Object.getOwnPropertyDescriptor(source, sym)
      if (descriptor.enumerable) {
        descriptors[sym] = descriptor
      }
    })
    Object.defineProperties(target, descriptors)
  })
  return target
}