Suspending mobx computation

suspend-computation.js

import { computed} from 'mobx'

const suspended = observable.box(false)
export function setSuspended(value) {
  suspended.set(value)
}
export function suspendableComputed(
  instance: any,
  propertyName: PropertyKey,
  descriptor: PropertyDescriptor,
  ...args
) {
  let cached
  const oldDescriptor = descriptor.get
  descriptor.get = function() {
    if (!suspended.get()) {
      cached = oldDescriptor.apply(this)
    }
    return cached
  }
  return computed(instance, propertyName, descriptor, ...args)
}