first commit

build/node_modules/svgo/plugins/removeUselessDefs.js

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+'use strict';
+
+exports.type = 'perItem';
+
+exports.active = true;
+
+exports.description = 'removes elements in <defs> without id';
+
+var nonRendering = require('./_collections').elemsGroups.nonRendering,
+    defs;
+
+/**
+ * Removes content of defs and properties that aren't rendered directly without ids.
+ *
+ * @param {Object} item current iteration item
+ * @return {Boolean} if false, item will be filtered out
+ *
+ * @author Lev Solntsev
+ */
+exports.fn = function(item) {
+
+    if (item.isElem('defs')) {
+
+        defs = item;
+        item.content = (item.content || []).reduce(getUsefulItems, []);
+
+        if (item.isEmpty()) return false;
+
+    } else if (item.isElem(nonRendering) && !item.hasAttr('id')) {
+
+        return false;
+
+    }
+
+};
+
+function getUsefulItems(usefulItems, item) {
+
+    if (item.hasAttr('id') || item.isElem('style')) {
+
+        usefulItems.push(item);
+        item.parentNode = defs;
+
+    } else if (!item.isEmpty()) {
+
+        item.content.reduce(getUsefulItems, usefulItems);
+
+    }
+
+    return usefulItems;
+}