ember-destroyable-polyfill

Polyfill for RFC 580 "Destroyables".

Installation

ember install ember-destroyable-polyfill

For addons, pass the -S flag.

Compatibility

• Ember.js v3.4 or above; completely inert for v3.22.0-alpha.1 and above
• ember-cli-babel v7.22.1 or above
• Ember CLI v2.13 or above
• Node.js v10 or above

Summary

Adds an API for registering destroyables and destructors with Ember's built in destruction hierarchy.

import { registerDestructor } from '@ember/destroyable';

class MyComponent extends Component {
  constructor() {
    let timeoutId = setTimeout(() => console.log('hello'), 1000);
    registerDestructor(this, () => clearTimeout(timeoutId));
  }
}

The API will also enable users to create and manage their own destroyables, and associate them with a parent destroyable.

import {
  associateDestroyableChild,
  registerDestructor
} from '@ember/destroyable';

class TimeoutManager {
  constructor(parent, fn, timeout = 1000) {
    let timeoutId = setTimeout(fn, timeout);
    associateDestroyableChild(parent, this);
    registerDestructor(this, () => clearTimeout(timeoutId));
  }
}

class MyComponent extends Component {
  manager = new TimeoutManager(this, () => console.log('hello'));
}

For detailed usage instructions, refer to the RFC 580 "Destroyables".

TypeScript Usage

TypeScript's normal type resolution for an import from @ember/destroyable will not find this the types provided by this package (since TypeScript would attempt to resolve it as node_modules/@ember/destroyable or under the Definitely Typed location for @ember/destroyable). Once the @ember/destroyable API is a documented part of Ember's API, the Definitely Typed folks will gladly accept adding that API, but in the meantime users will need to modify their tsconfig.json to tell TypeScript where these types are.

Add the following to your tsconfig.json:

{
  // ...snip...
  "paths": {
    // ...snip...
    "@ember/destroyable": ["node_modules/ember-destroyable-polyfill"],
  }
}