63 lines
1.8 KiB
JavaScript
63 lines
1.8 KiB
JavaScript
/** @format */
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/**
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* External dependencies
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*/
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import { createContext } from '@wordpress/element';
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import PropTypes from 'prop-types';
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/**
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* Context container for heading level. We start at 2 because the `h1` is defined in <Header />
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*
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* See https://medium.com/@Heydon/managing-heading-levels-in-design-systems-18be9a746fa3
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*/
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const Level = createContext( 2 );
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/**
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* These components are used to frame out the page content for accessible heading hierarchy. Instead of defining fixed heading levels
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* (`h2`, `h3`, …) you can use `<H />` to create "section headings", which look to the parent `<Section />`s for the appropriate
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* heading level.
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*
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* @param { object } props -
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* @return { object } -
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*/
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export function H( props ) {
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return (
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<Level.Consumer>
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{ level => {
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const Heading = 'h' + Math.min( level, 6 );
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return <Heading { ...props } />;
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} }
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</Level.Consumer>
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);
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}
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/**
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* The section wrapper, used to indicate a sub-section (and change the header level context).
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*
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* @return { object } -
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*/
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export function Section( { component, children, ...props } ) {
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const Component = component || 'div';
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return (
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<Level.Consumer>
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{ level => (
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<Level.Provider value={ level + 1 }>
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{ false === component ? children : <Component { ...props }>{ children }</Component> }
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</Level.Provider>
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) }
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</Level.Consumer>
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);
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}
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Section.propTypes = {
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/**
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* The wrapper component for this section. Optional, defaults to `div`. If passed false, no wrapper is used. Additional props
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* passed to Section are passed on to the component.
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*/
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component: PropTypes.oneOfType( [ PropTypes.func, PropTypes.string, PropTypes.bool ] ),
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/**
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* The children inside this section, rendered in the `component`. This increases the context level for the next heading used.
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*/
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children: PropTypes.node,
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};
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