Website Structure

Frontend-Learner/node_modules/svgo/plugins/removeUselessDefs.js

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+import { detachNodeFromParent } from '../lib/xast.js';
+import { elemsGroups } from './_collections.js';
+
+export const name = 'removeUselessDefs';
+export const description = 'removes elements in <defs> without id';
+
+/**
+ * Removes content of defs and properties that aren't rendered directly without ids.
+ *
+ * @author Lev Solntsev
+ *
+ * @type {import('../lib/types.js').Plugin}
+ */
+export const fn = () => {
+  return {
+    element: {
+      enter: (node, parentNode) => {
+        if (
+          node.name === 'defs' ||
+          (elemsGroups.nonRendering.has(node.name) &&
+            node.attributes.id == null)
+        ) {
+          /** @type {import('../lib/types.js').XastElement[]} */
+          const usefulNodes = [];
+          collectUsefulNodes(node, usefulNodes);
+          if (usefulNodes.length === 0) {
+            detachNodeFromParent(node, parentNode);
+          }
+          node.children = usefulNodes;
+        }
+      },
+    },
+  };
+};
+
+/**
+ * @param {import('../lib/types.js').XastElement} node
+ * @param {import('../lib/types.js').XastElement[]} usefulNodes
+ */
+const collectUsefulNodes = (node, usefulNodes) => {
+  for (const child of node.children) {
+    if (child.type === 'element') {
+      if (child.attributes.id != null || child.name === 'style') {
+        usefulNodes.push(child);
+      } else {
+        collectUsefulNodes(child, usefulNodes);
+      }
+    }
+  }
+};