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/**
* Accessibility (a11y) functions, types, helpers.
*
* @see https://www.w3.org/WAI/
* @see https://www.w3.org/TR/wai-aria-1.1/
* @see https://www.w3.org/TR/svg-aam-1.0/
*/
import type { D3Element } from './mermaidAPI.js';
/**
* Add role and aria-roledescription to the svg element.
*
* @param svg - d3 object that contains the SVG HTML element
* @param diagramType - diagram name for to the aria-roledescription
*/
export declare function setA11yDiagramInfo(svg: D3Element, diagramType: string): void;
/**
* Add an accessible title and/or description element to a chart.
* The title is usually not displayed and the description is never displayed.
*
* The following charts display their title as a visual and accessibility element: gantt.
*
* @param svg - d3 node to insert the a11y title and desc info
* @param a11yTitle - a11y title. undefined or empty strings mean to skip them
* @param a11yDesc - a11y description. undefined or empty strings mean to skip them
* @param baseId - id used to construct the a11y title and description id
*/
export declare function addSVGa11yTitleDescription(svg: D3Element, a11yTitle: string | undefined, a11yDesc: string | undefined, baseId: string): void;
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