TypeTags .WeakMap

Overview#

The WeakMap object is a collection of key/value pairs in which the keys are weakly referenced. The keys must be objects and the values can be arbitrary values.

Usage#

import { TypeTags } from 'typetags'

const privates = new WeakMap()

function Public() {
  const hidden = {
    // private data goes here
  }
  privates.set(this, hidden)
}

Public.prototype.method = function () {
  const secrets = privates.get(this)
  // do stuff with private data
}

TypeTags.get(privates) === TypeTags.WeakMap
// → true

console.log(TypeTags.WeakMap)
// → [object WeakMap]

Metadata (TType)#

Signature#

declare type ITypeTags = {
  [key in Types | NestedTypes]: Tags
}

declare interface Predicate {
  predicate(value: any): boolean
}

See MDN Web Docs#