flow like the river

BACK_BACK/node_modules/htmlnano/lib/modules/collapseAttributeWhitespace.js

@@ -0,0 +1,32 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = collapseAttributeWhitespace;
+exports.attributesWithLists = void 0;
+const attributesWithLists = new Set(['class', 'rel', 'ping']);
+/** Collapse whitespaces inside list-like attributes (e.g. class, rel) */
+
+exports.attributesWithLists = attributesWithLists;
+
+function collapseAttributeWhitespace(tree) {
+  tree.walk(node => {
+    if (!node.attrs) {
+      return node;
+    }
+
+    Object.entries(node.attrs).forEach(([attrName, attrValue]) => {
+      const attrNameLower = attrName.toLowerCase();
+
+      if (!attributesWithLists.has(attrNameLower)) {
+        return;
+      }
+
+      const newAttrValue = attrValue.replace(/\s+/g, ' ').trim();
+      node.attrs[attrName] = newAttrValue;
+    });
+    return node;
+  });
+  return tree;
+}