Package Exports
- promise.prototype.finally
- promise.prototype.finally/shim
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (promise.prototype.finally) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
promise.prototype.finally 
ES Proposal spec-compliant shim for Promise.prototype.finally. Invoke its "shim" method to shim Promise.prototype.finally
if it is unavailable or noncompliant. Note: a global Promise
must already exist: the es6-shim is recommended.
This package implements the es-shim API interface. It works in an ES3-supported environment that has Promise
available globally, and complies with the proposed spec.
Most common usage:
var assert = require('assert');
var promiseFinally = require('promise.prototype.finally');
var resolved = Promise.resolve(42);
var rejected = Promise.reject(-1);
promiseFinally(resolved, function () {
assert.equal(arguments.length, 0);
return Promise.resolve(true);
}).then(function (x) {
assert.equal(x, 42);
});
promiseFinally(rejected, function () {
assert.equal(arguments.length, 0);
}).catch(function (e) {
assert.equal(e, -1);
});
promiseFinally(rejected, function () {
assert.equal(arguments.length, 0);
throw false;
}).catch(function (e) {
assert.equal(e, false);
});
promiseFinally.shim(); // will be a no-op if not needed
resolved.finally(function () {
assert.equal(arguments.length, 0);
return Promise.resolve(true);
}).then(function (x) {
assert.equal(x, 42);
});
rejected.finally(function () {
assert.equal(arguments.length, 0);
}).catch(function (e) {
assert.equal(e, -1);
});
rejected.finally(function () {
assert.equal(arguments.length, 0);
throw false;
}).catch(function (e) {
assert.equal(e, false);
});
Tests
Simply clone the repo, npm install
, and run npm test
Thanks
Huge thanks go out to @matthew-andrews, who provided the npm package name for v2 of this module. v1 is both in the original repo and preserved in a branch