albertofortes

If you are using Gatsby as static website or blog, probably you are a developer. In that case, you will need code syntax highlighting to the code blocks. As usual Gatsby provide us an easy way to achieve it into the markdown.

Run the next command:

npm install --save gatsby-remark-prismjs prismjs

Once installed, open your gatsby-config.js file and add:

1plugins: [
2  {
3    resolve: `gatsby-transformer-remark`,
4    options: {
5      plugins: [
6        `gatsby-remark-prismjs`,
7      ]
8    }
9  }
10]

Note: probably you was using already gatsby-transformer-remark so, just swap this line for those.

Next, open gatsbybrowser.js_ and add:

1require("prismjs/themes/prism-solarizedlight.css");
2require("prismjs/plugins/line-numbers/prism-line-numbers.css");

To use in markdown, add three followed by language name as:

1```javascript
2plugins: [
3  {
4    resolve: `gatsby-transformer-remark`,
5    options: {
6      plugins: [
7        `gatsby-remark-prismjs`,
8      ]
9    }
10  }
11]```

That's all! Remember markdown syntax: add a <pre> tag is done by adding four empty spaces.

And, of course, check official plugin documentation here.