Unverified Commit f6bddd79 authored by Ryan Hofschneider's avatar Ryan Hofschneider Committed by GitHub

Merge pull request #113 from 18F/remove-web-components-libraries

Remove web components and libraries sections
parents d77fda71 783b474b
......@@ -43,8 +43,6 @@ js:
href: /javascript/dependencies/
- text: Frameworks
href: /javascript/frameworks/
- text: Libraries
href: /javascript/libraries/
- text: Style / Linting
href: /javascript/style/
......
......@@ -6,7 +6,6 @@ title: Front-End Disciplines
## Related topics
* [CSS]({{site.baseurl}}/css)
* [JavaScript]({{site.baseurl}}/javascript)
* [Web Components]({{site.baseurl}}/web-components)
* [Security]({{site.baseurl}}/security)
## What is front end?
......
---
title: Libraries
sidenav: js
---
# Libraries
## Scrolling
### skrollr
[Skrollr] is stand-alone parallax scrolling library for mobile (Android + iOS) and desktop.
#### When to use
- For building scrolling effects that have different requirements that very standard parallax. Skrollr has a lot of flexibility.
- When supporting mobile web (even though it won't be a perfect experience) is a requirement.
- Does not require jQuery
#### When not to use
- If there are concerns the library has been inactive for too long and will break with newer browsers. skrollr hasn't been under active development since about September 2014.
- If skrollr's method of controlling animation in the markup doesn't work for the project's architecture.
### stellar.js
Parallax scrolling made easy, [stellar.js].
#### When to use
- For building simple parallax effects as well as more complex ones through the use of advanced configuration.
#### When not to use
- If there are concerns the library has been inactive for too long and will break with newer browsers.
- When some amount of experience on mobile is required. Stellar on mobile requires more configuration than something like skrollr.
- When you don't want to require jQuery, instead see skrollr.
## Tables
### DataTables
[DataTables] is a jQuery tool to progressively enhance HTML tables with advanced interactive features, such as sorting, paging, filtering, etc.
#### When to use
- Creating an interactive table that doesn't need to be configured or restyled very much from what DataTables offers.
#### When not to use
- When the interactive table being created will be very custom and will not look and/or function like the basic examples on the data tables website.
- When your site doens't require jQuery.
- When elements around or interacting with the table use percentages for positioning. DataTables forces the table to use absolute units (pixels) which get manipulated. This means it can be problematic for responsive sites.
#### Pros
- Is relatively easy to set up for a table in default styling and functionality.
#### Cons
- Has a confusing syntax for expressing HTML in its API.
- No ability to work without JavaScript.
- Uses absolute units for everything rather than percentages, making it very hard to make it work with other responsive elements.
- Tries to accomplish everything possible, which makes the API confusing.
- Documentation on the API can be incomplete and hard to follow.
[Datatables]: https://www.datatables.net
[Skrollr]: http://prinzhorn.github.io/skrollr/
[stellar.js]: http://markdalgleish.com/projects/stellar.js/
---
title: Web Components
---
# Web Components
## Initial Impressions
First, check out [this article](http://developer.telerik.com/featured/web-components-arent-ready-production-yet/) and [its follow-up](http://developer.telerik.com/featured/web-components-ready-production/) for some background on whether Web Components (or, more specifically, [custom elements]) are ready for production. TL;DR:
* Custom element [polyfills](https://github.com/WebReflection/document-register-element) (needed for [every browser except Chrome](http://caniuse.com/#search=custom%20elements)) are indeed ready for production.
* If you need the [template element](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/template) and the so-called [shadow DOM](http://www.html5rocks.com/en/tutorials/webcomponents/shadowdom/) for style encapsulation, you're [out of luck](http://caniuse.com/#search=shadow%20dom): outside of Chrome, only Firefox supports it, and only with a hidden setting. Things might change soon though, as Edge (ex-IE) has also recently implemented <template> element. (The polyfills for shadow DOM, particularly, are *uuuuugly*.)
* The JavaScript libraries that expose similar APIs for defining web components are a mixed bag, as you'll see below.
My first stop when sussing out web components was [WebComponents.org], which appears to be a collaboration between Google (makers of [Polymer]), Mozilla (makers of [x-tag]) and other open web technology folks. There's also [CustomElements.io](https://customelements.io/), which serves as a showcase for [custom elements] made primarily with Polymer and x-tag. I also enjoyed poking around the [examples](http://component.kitchen/components) on [component.kitchen], which are all available on GitHub.
So, what about the tools?
## [x-tag]
I tried Mozilla's x-tag first, and was impressed. The [API](http://x-tags.org/docs) is simple, I liked that you can declare components in vanilla JS, and I was able to get something working in Chrome quickly. However, I was forced to abandon it after running into untraceable errors in x-tag core when testing in IE9. x-tag also relies on the same polyfills as Polymer, which are a pain to get and update (see below for more details). Survey says:
:-1: **I couldn't get it working in IE9**—or any browser other than Chrome, for that matter.
## [Polymer]
Google's Polymer Project fully embraces [HTML imports], which are a way to encapsulate your component's contents, behavior and appearance in a separate HTML file. It's a neat framework, but it also assumes that you want all of the bells and whistles, including two-way data binding and the [shadow DOM]. In my testing it also appeared to be wholly incompatible with IE9, and thus basically unusable at 18F.
:warning: The suite of polyfills that Polymer requires also entails an unnecessarily convoluted [build process](https://www.polymer-project.org/0.5/resources/tooling-strategy.html#building-individual-polyfills) if you don't need all of its features. Documentation for the polyfills is sparse, and I was unable to find any mention of the errors that I encountered in IE9. For future reference, it's best to get everything from a [CDN](http://cdnjs.com/libraries/webcomponentsjs) or [install them from npm or bower](http://webcomponents.org/polyfills/). Also, if you don't need the shadow DOM, save yourself some bytes and use the bundled `webcomponents-lite.js`, which just provides [custom elements] and [HTML imports].
:-1: **Polymer gets my thumbs down for trying to do too much.**
## Vanilla JS ([document.registerElement()](https://github.com/WebReflection/document-register-element))
Next up, I tried out [Andrea Giammarchi's](http://webreflection.blogspot.com/2014/07/a-w3c-custom-elements-alternative.html) [polyfill](https://github.com/WebReflection/document-register-element) for the core custom elements API, the `document.registerElement()` function. Andrea's polyfill has some major advantages over x-tag and Polymer:
1. At just 3K minified and zipped, it's *tiny* compared to Polymer's hefty 150K payload (after you include all of the necessary polyfills).
2. It works in IE9 if you include either [aight] or Andrea's [dom4] polyfill.
3. The API does exactly what the spec says it should, and nothing more. No two-way data binding, no event delegation, no performance-hobbling shadow DOM shims (or shams).
:+1: **Use this! It works great!**
## [Bosonic]
A link to [Bosonic] features prominently on [WebComponents.org], and claims support for IE9. Unlike x-tag and Polymer, Bosonic simply follows the web component specs and uses a transpiler to convert [HTML imports] into vanilla JS and CSS at runtime. Check out the [docs](http://bosonic.github.io/documentation.html) for more info. The [platform](https://github.com/bosonic/bosonic/blob/master/dist/bosonic-platform.js) and [runtime](https://github.com/bosonic/bosonic/blob/master/dist/bosonic-runtime.js) JS files weigh in at about 82K total.
:question: **I didn't get a chance to try this one**, but it's worth a look if you need [HTML imports] and [shadow DOM].
[x-tag]: http://x-tags.org/
[Polymer]: https://www.polymer-project.org/
[Bosonic]: http://bosonic.github.io/
[WebComponents.org]: http://webcomponents.org/
[component.kitchen]: http://component.kitchen/
[custom elements]: http://www.smashingmagazine.com/2014/03/04/introduction-to-custom-elements/
[HTML imports]: http://webcomponents.org/articles/introduction-to-html-imports/
[template tag]: http://www.html5rocks.com/en/tutorials/webcomponents/template/
[shadow DOM]: http://www.html5rocks.com/en/tutorials/webcomponents/shadowdom/
[aight]: https://github.com/shawnbot/aight
[dom4]: https://github.com/WebReflection/dom4
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