Polymer element that helps implementing singleton pattern declaratively.
Common use case is to provide shared state in your elements (e.g. for configuration).
Using ES6 features, so take care in production apps.
- Try out live demo.
- Learn about element properties and methods in component page (temporarily not working).
<!-- myValue is now 'something' -->[[myValue]]
key is a property name to bind
You can also use deep keys, like
The following Polymer helper methods are not implemented for manipulating
data object directly:
It would also be great to implement "domains" so that there could be different groups of singletons.
From here on, documentation will only concern development of this component.
Element dependencies are managed via Bower. You can install that via:
npm install -g bower
Then, go ahead and download the element's dependencies:
Playing With Your Element
If you wish to work on your element in isolation, we recommend that you use Polyserve to keep your element's bower dependencies in line. You can install it via:
npm install -g polyserve
And you can run it via:
Once running, you can preview your element at
f-singleton is the name of the directory containing it.
Testing Your Element
Simply navigate to the
/test directory of your element to run its tests. If
you are using Polyserve:
The tests are compatible with web-component-tester. Install it via:
npm install -g web-component-tester
Then, you can run your tests on all of your local browsers via:
wct -l chrome will only run tests in chrome.
wct -p will keep the browsers alive after test runs (refresh to re-run).
wct test/some-file.html will test only the files you specify.