App Layout

A collection of elements, along with guidelines and templates that can be used to structure your app’s layout.

<app-header reveals>
  <app-toolbar>
    <paper-icon-button icon="menu" onclick="drawer.toggle()"></paper-icon-button>
    <div main-title>My app</div>
    <paper-icon-button icon="delete"></paper-icon-button>
    <paper-icon-button icon="search"></paper-icon-button>
    <paper-icon-button icon="close"></paper-icon-button>
    <paper-progress value="10" indeterminate bottom-item></paper-progress>
  </app-toolbar>
</app-header>
<app-drawer id="drawer" swipe-open></app-drawer>
<sample-content size="10"></sample-content>

Install

$ bower install PolymerElements/app-layout --save

Import

<link rel="import" href="/bower_components/app-layout/app-layout.html">

What is inside

Elements

• app-box - A container element that can have scroll effects - visual effects based on scroll position.

• app-drawer - A navigation drawer that can slide in from the left or right.

• app-drawer-layout - A wrapper element that positions an app-drawer and other content.

• app-grid - A helper class useful for creating responsive, fluid grid layouts using custom properties.

• app-header - A container element for app-toolbars at the top of the screen that can have scroll effects - visual effects based on scroll position.

• app-header-layout - A wrapper element that positions an app-header and other content.

• app-toolbar - A horizontal toolbar containing items that can be used for label, navigation, search and actions.

Templates

The templates are a means to define, illustrate and share best practices in App Layout. Pick a template and customize it:

• Getting started (Demo - Source)

• Landing page (Demo - Source)

• Publishing: Zuperkülblog (Demo - Source)

• Shop: Shrine (Demo - Source)

• Blog: Pesto (Demo - Source)

• Scroll effects: Test drive (Demo - Source)

Patterns

Sample code for various UI patterns:

• Transform navigation: As more screen space is available, side navigation can transform into tabs. (Demo - Source)

• Expand Card: Content cards may expand to take up more horizontal space. (Demo - Source)

• Material Design Responsive Toolbar: Toolbar changes its height and padding to adapt mobile screen size. (Demo - Source)

Users

Here are some web apps built with App Layout:

• Youtube Web
• Google I/O 2016
• Polymer project site
• Polymer summit
• Shop
• News
• webcomponents.org
• Chrome Status
• Project Fi
• NASA Open Source Software

Tools and References

• Polymer App Toolbox
• Material Design Adaptive UI Pattern

Changes in App Layout 2.0

• Distribution is now done with slots, so things have changed because of that,

  app-drawer-layout

  1.x

  <app-drawer-layout>
    <app-drawer>...</app-drawer>
    <div>content</div>
  </app-drawer-layout>

  2.0

  <app-drawer-layout>
    <app-drawer slot="drawer">...</app-drawer>
    <div>content</div>
  </app-drawer-layout>

  app-header-layout

  1.x

  <app-header-layout>
    <app-header>...</app-header>
    <div>content</div>
  </app-header-layout>

  2.0

  <app-header-layout>
    <app-header slot="header">...</app-header>
    <div>content</div>
  </app-header-layout>

  app-box

  1.x

  <app-box effects="...">
    <img background ...>
  </app-box>

  2.0

  <app-box effects="...">
    <img slot="background" ...>
  </app-box>

• In app-drawer-layout, the drawer-toggle element needs to be manually hidden when app-drawer-layout is not in narrow layout. To add this, add the following CSS rule where app-drawer-layout is used:

  app-drawer-layout:not([narrow]) [drawer-toggle] {
    display: none;
  }

• In app-drawer-layout, if you specify a value for --app-drawer-width, that value must be accessible by both app-drawer and app-drawer-layout. This can be done by defining the value on the :host that contains (or html if outside a shadow root):

  :host {
    --app-drawer-width: 300px;
  }

• app-scrollpos-control has been removed from App Layout in favor of using multiple scrolling regions to preserve the scroll position. In terms of UX, document.rootScroller is a new web platform API that will allow non-document scroll to hide the address bar on mobile.