@marc-r2/mdast-util-ofm-highlight/dist/lib/toMarkdown.js

mdast extension to support OFM highlights

/**
 * Create an extension for `mdast-util-to-markdown` to enable OFM highlights in markdown.
 */
export function ofmHighlightToMarkdown() {
    return {
        handlers: {
            ofmHighlight(node) {
                const value = node.value;
                const pre = node.pre;
                const post = node.post;
                return `${"=".repeat(pre)}${value}${"=".repeat(post)}`;
            },
        },
    };
}