phosphor-disposable

phosphor-disposable

A module for expressing the disposable object pattern.

API Docs

Package Install

Prerequisites

• node

npm install --save phosphor-disposable

Source Build

Prerequisites

• git
• node

git clone https://github.com/phosphorjs/phosphor-disposable.git
cd phosphor-disposable
npm install

Rebuild

npm run clean
npm run build

Run Tests

Follow the source build instructions first.

npm test

Build Docs

Follow the source build instructions first.

npm run docs

Navigate to docs/index.html.

Supported Runtimes

The runtime versions which are currently known to work are listed below. Earlier versions may also work, but come with no guarantees.

• Node 0.12.7+
• IE 11+
• Firefox 32+
• Chrome 38+

Bundle for the Browser

Follow the package install instructions first.

npm install --save-dev browserify
browserify myapp.js -o mybundle.js

Usage Examples

Note: This module is fully compatible with Node/Babel/ES6/ES5. Simply omit the type declarations when using a language other than TypeScript.

import {
  DisposableDelegate, DisposableSet, IDisposable
} from 'phosphor-disposable';


// Convert a function into a disposable.
var delegate = new DisposableDelegate(() => {
  console.log('disposed');
});

delegate.dispose();  // logs: 'disposed'
delegate.dispose();  // no-op


// Create a collection of disposables.
var d1 = new DisposableDelegate(() => {
  console.log('one');
});

var d2 = new DisposableDelegate(() => {
  console.log('two');
});

var d3 = new DisposableDelegate(() => {
  console.log('three');
});

var set = new DisposableSet([d1, d2, d3]);

set.dispose();  // logs: 'one', 'two', 'three'
set.dispose();  // no-op


// Create a custom disposable.
class MyDisposable implements IDisposable {

  constructor(id: string) {
    this._id = id;
  }

  get isDisposed(): boolean {
    return this._id === null;
  }

  dispose(): void {
    if (this._id !== null) {
      console.log(this._id);
      this._id = null;
    }
  }

  private _id: string;
}

var foo = new MyDisposable('foo');
var bar = new MyDisposable('bar');
var baz = new MyDisposable('baz');

var set = new DisposableSet();
set.add(foo);
set.add(bar);
set.add(baz);

set.dispose();  // logs: 'foo', 'bar', 'baz'
set.dispose();  // no-op