bind all onXXX methods of an object

bindEventListeners.js

export function bindMethods(obj, filter) {
  if (obj) {
    for (let name of Object.getOwnPropertyNames(Object.getPrototypeOf(obj))) {
      let value = obj[name]
      if (typeof value === 'function' && filter(name, value)) {
        obj[name] = value.bind(obj)
      }
    }
  }
}

const eventListenerFilter = (name, method) => /on[A-Z]\w*/.test(name)

export function bindEventListeners(obj) {
  bindMethods(obj, eventListenerFilter)
}