feat: Added head filter

eleventy.config.js

@@ -1,4 +1,5 @@
 import { feedPlugin } from "@11ty/eleventy-plugin-rss";
+import filtersPlugin from "./src/_config/filters.js";
 
 /** @param {import("@11ty/eleventy").UserConfig} eleventyConfig */
 export default async function(eleventyConfig) {
@@ -24,6 +25,8 @@ export default async function(eleventyConfig) {
 		}
 	});
 
+  eleventyConfig.addPlugin(filtersPlugin);
+
   eleventyConfig.addShortcode("triangleSvg", function(strokeWidth = 10) {
     const w = parseFloat(strokeWidth);
     if (isNaN(w) || w <= 0) {

src/_config/filters.js

@@ -0,0 +1,10 @@
+export default function(eleventyConfig) {
+	// Get the first element of a collection.
+	eleventyConfig.addFilter("head", (array) => {
+		if(!Array.isArray(array) || array.length === 0) {
+			return null;
+		}
+
+    return array[0];
+	});
+};