flow like the river

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

@@ -0,0 +1,31 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = removeEmptyAttributes;
+// Source: https://www.w3.org/TR/html4/sgml/dtd.html#events (Generic Attributes)
+const safeToRemoveAttrs = new Set(['id', 'class', 'style', 'title', 'lang', 'dir', 'onclick', 'ondblclick', 'onmousedown', 'onmouseup', 'onmouseover', 'onmousemove', 'onmouseout', 'onkeypress', 'onkeydown', 'onkeyup']);
+/** Removes empty attributes */
+
+function removeEmptyAttributes(tree) {
+  tree.walk(node => {
+    if (!node.attrs) {
+      return node;
+    }
+
+    Object.entries(node.attrs).forEach(([attrName, attrValue]) => {
+      const attrNameLower = attrName.toLowerCase();
+
+      if (!safeToRemoveAttrs.has(attrNameLower)) {
+        return;
+      }
+
+      if (attrValue === '' || (attrValue || '').match(/^\s+$/)) {
+        delete node.attrs[attrName];
+      }
+    });
+    return node;
+  });
+  return tree;
+}