Compose using an instance? about stampit HOT 4 CLOSED

Sure there is a way. Actually, three ways. :)

If your POJO props need to go the __proto__ then:

const obj = {name: 'something'}
const Thing = stampit.methods(obj).compose(OtherStamp, etc..)

If they need to be regular properties (a-la mixin) then:

const obj = {name: 'something'}
const Thing = stampit.props(obj).compose(OtherStamp, etc..)

If you want some control over assignment logic then:

const obj = {name: 'something'}
const Thing = stampit.init(function () {
  this.name = obj.name;
}).compose(OtherStamp, etc..)

A good idea would be to extract that stamp to a separate variable, which would have a descriptive name. For example:

const HaveNameSomething = stampit.props({name: 'something'})

const Thing = stampit(HaveNameSomething, OtherStamp, etc..)

Here is a 5 min article which can help you to get your head around the above code.

from stampit.

Amazing, so simple.. thank you.

from stampit.

Quick followup, if obj was instantiated from a Stamp, its methods are on proto, which means neither .props nor .methods will pick them up:

  const Bar = stampit.methods({
    bar() {
      console.log('bar');
    }
  });

  const obj = Bar();

  const a = stampit.props(obj)(); // a.bar() undefined
  const b = stampit.methods(obj)(); // b.bar() undefined
  const c = stampit.methods(obj.__proto__)(); // bcbar() exists

Is this recommended if you want to enhance an existing Instance:
const d = stampit.props(obj).methods(obj.__proto__).compose(Something)()

from stampit.

We recommend developers to do whatever they want with they code!
Stampit do not have any formal rules you should follow.
So, yeah. Your code is absolutely valid and recommended. :)

Good job on reading the above mentioned article. 👍

from stampit.