uniorg-slug/lib/index.js

uniorg plugin to add `id` attributes to headlines

import { visit } from 'unist-util-visit';
import GithubSlugger from 'github-slugger';
import { toString } from 'orgast-util-to-string';
export const uniorgSlug = (options = {}) => {
    return transformer;
    function transformer(tree, _file) {
        const slugger = new GithubSlugger();
        visit(tree, 'section', (section) => {
            const headline = section.children[0];
            const data = (headline.data = headline.data || {});
            const props = (data.hProperties = data.hProperties || {});
            if (!props.id) {
                const id = customId(section) ?? slugger.slug(toString(headline));
                props.id = id;
            }
        });
    }
};
function customId(section) {
    const drawer = section.children.find((node) => node.type === 'property-drawer');
    const property = drawer?.children?.find((node) => node.type === 'node-property' && node.key === 'CUSTOM_ID');
    return property?.value;
}
export default uniorgSlug;
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