${text}
\nQuestion1?
\\n\", \"a\": \"answer1
\\n\" },\n { \"q\": \"Question2?
\\n\", \"a\": \"answer2
\\n\" }\n ]\n}\n```\n\n**Notes about the wildcard**\n\n- It acts like the single bash globstar. If you specify `*` this would only match the properties at the first level of the metadata.\n- If a wildcard keypath matches a key whose value is not a string, it will be ignored.\n- It is set to `false` by default because it can incur some overhead if it is applied too broadly.\n\n### Defining a dictionary of markdown globalRefs\n\nMarkdown allows users to define links in [reference style](https://www.markdownguide.org/basic-syntax/#reference-style-links) (`[]:`). \nIn a Metalsmith build it may be especially desirable to be able to refer to some links globally. The `globalRefs` options allows this:\n\n```js\nmetalsmith.use(\n markdown({\n globalRefs: {\n twitter_link: 'https://twitter.com/johndoe',\n github_link: 'https://github.com/johndoe',\n photo: '/assets/img/me.png'\n }\n })\n)\n```\n\nNow _contents of any file or metadata key_ processed by @metalsmith/markdown will be able to refer to these links as `[My Twitter][twitter_link]` or `![Me][photo]`. You can also store the globalRefs object of the previous example in a `metalsmith.metadata()` key and pass its keypath as `globalRefs` option instead.\n\nThis enables a flow where you can load the refs into global metadata from a source file with [@metalsmith/metadata](https://github.com/metalsmith/metadata), and use them both in markdown and templating plugins like [@metalsmith/layouts](https://github.com/metalsmith/layouts):\n\n```js\nmetalsith\n .metadata({\n global: {\n links: {\n twitter: 'https://twitter.com/johndoe',\n github: 'https://github.com/johndoe'\n }\n }\n })\n // eg in a markdown file: [My Twitter profile][twitter]\n .use(markdown({ globalRefs: 'global.links' }))\n // eg in a handlebars layout: {{ global.links.twitter }}\n .use(layouts({ pattern: '**/*.html' }))\n```\n\n### Custom markdown rendering\n\nYou can use a custom renderer by using `marked.Renderer()`\n\n```js\nimport markdown from '@metalsmith/markdown'\nimport { marked } from 'marked'\nconst markdownRenderer = new marked.Renderer()\n\nmarkdownRenderer.image = function (href, title, text) {\n return `\n${text}
\n