Demo and API docs

##<iron-flex-layout>

The <iron-flex-layout> component provides simple ways to use CSS flexible box layout, also known as flexbox. This component provides two different ways to use flexbox:

1. Layout classes. The layout class stylesheet provides a simple set of class-based flexbox rules, that let you specify layout properties directly in markup. You must include this file in every element that needs to use them.

Sample use:

<style is="custom-style" include="iron-flex iron-flex-alignment"></style>

cross axis start alignment

1. Custom CSS mixins. The mixin stylesheet includes custom CSS mixins that can be applied inside a CSS rule using the @apply function.

Please note that the old /deep/ layout classes are deprecated, and should not be used. To continue using layout properties directly in markup, please switch to using the new dom-module-based layout classes. Please note that the new version does not use /deep/, and therefore requires you to import the dom-modules in every element that needs to use them.

A complete guide to <iron-flex-layout> is available.