ember-a11y-landmarks

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ember-a11y-landmarks

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Ember addon to help with landmark roles for better accessibility

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# ember-a11y-landmarks

[![Latest NPM release](https://img.shields.io/npm/v/ember-a11y-landmarks.svg)](https://www.npmjs.com/package/ember-a11y-landmarks)
[![TravisCI Build Status](https://img.shields.io/travis/ember-a11y/ember-a11y-landmarks/master.svg?label=TravisCI)](https://travis-ci.org/ember-a11y/ember-a11y-landmarks)

The `ember-a11y-landmarks` addon helps you assign the `role` attribute that should go on landmark tags like `<header>` and `<nav>`, without needing to learn the intricacies of when to add roles or what they should be. A landmark is a special kind of semantic HTML tag that Assistive technology(AT) uses to parse a page correctly.

When is this addon needed? In a typical Ember app, almost everything gets wrapped in a `<div>`, but this can be confusing to tools like screen readers. The Assistive Technology expects that either landmark elements are direct descendants of the `<body>` element or that they have a particular `role` attribute. `ember-a11y-landmarks` handles this problem for you.

## How this addon works

This addon helps add the correct roles to the following elements:

| tagName | role          |
| ------- | ------------- |
| header  | banner        |
| nav     | navigation    |
| aside   | complementary |
| main    | main          |
| form    | form          |
| footer  | contentinfo   |

While semantic landmark tags are best for accessibility, some developers may be faced with working on an app that uses `div` tags instead. For those cases, this addon provides a way to add roles to a `div` element until they can be refactored (see [Div Usage](#div-usage)).

```bash
ember install ember-a11y-landmarks
```

## Landmark Tag Usage

This addon is used like a block component. Just set the `tagName` attribute to `header`, `nav`, `aside`, `main`, `form`, or `footer`, and put your content inside the block. For example, here's a header:

```hbs
<A11yLandmark @tagName="header">
    This is my header content
</A11yLandmark>
```

The resulting markup in the DOM will have the correct tag type and the role that should be used for that tag:

<header id="ember337" role="banner" class="ember-view">
        This is my header content
    </header>

## Div Usage

If a developer must use a div instead of a semantic tag like `<header>`, define `landmarkRole` instead of `tagname`. You can look up the correct landmark role in the  [How this addon works](#how-this-addon-works) table. Here's a header example:

```hbs
  <A11yLandmark @landmarkRole="banner">
      This is my header content (that should be refactored later to go inside a real header tag)
  </A11yLandmark>
```

In the DOM markup, this will result in a `div` with the specified `role`:

<div id="ember337" role="banner" class="ember-view">
         This is my header content (that should be refactored later to go inside a real header tag)
    </div>

## Form/Search Usage

If defining a form, no additional `landmarkRole` is required. However, if the form will be used as a search, then the `landmarkRole` value should be set to `search`.

Form:

```hbs
<A11yLandmark @tagName="form">
    ...
</A11yLandmark>
```

Search:

```hbs
<A11yLandmark @tagName="form" @landmarkRole="search">
    ...
</A11yLandmark>
```

## Contributions

Contributions to this project are encouraged.

## Compatibility

-   Ember.js v3.12 or above
-   Ember CLI v2.13 or above
-   Node.js v10 or above

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