/** | |
* @license | |
* Copyright 2021 Google LLC | |
* SPDX-License-Identifier: Apache-2.0 | |
*/ | |
import {css} from 'lit'; | |
export const a11yStyles = css` | |
.assistive-tech-only { | |
user-select: none; | |
clip: rect(1px, 1px, 1px, 1px); | |
height: 1px; | |
margin: 0; | |
overflow: hidden; | |
padding: 0; | |
position: absolute; | |
white-space: nowrap; | |
width: 1px; | |
z-index: -1000; | |
} | |
`; | |
const $_documentContainer = document.createElement('template'); | |
$_documentContainer.innerHTML = `<dom-module id="gr-a11y-styles"> | |
<template> | |
<style> | |
${a11yStyles.cssText} | |
</style> | |
</template> | |
</dom-module>`; | |
document.head.appendChild($_documentContainer.content); |