APromise is an implementation of the Promise/A+ spec.

• promise-es5.js is in ES5 grammar
• promise-core.js is in ES6 grammar, using the ES Module
  • promise-test.js is test suite for promise-core.js
• promise-extension.js provides some functions for promise-core.js
  • Promise-extension-test.js should be the test cases for the extension function.
• promise-util.js provides some function for promise-core.js

• npm install
• npm run test, for promise-core.js
• npm run test-es5, for promise-es5.js
• npm run test-ext, for promise-extension.js