Update from Vibe Studio

node_modules/rc-util/es/Dom/class.js

@@ -0,0 +1,26 @@
+export function hasClass(node, className) {
+  if (node.classList) {
+    return node.classList.contains(className);
+  }
+  var originClass = node.className;
+  return " ".concat(originClass, " ").indexOf(" ".concat(className, " ")) > -1;
+}
+export function addClass(node, className) {
+  if (node.classList) {
+    node.classList.add(className);
+  } else {
+    if (!hasClass(node, className)) {
+      node.className = "".concat(node.className, " ").concat(className);
+    }
+  }
+}
+export function removeClass(node, className) {
+  if (node.classList) {
+    node.classList.remove(className);
+  } else {
+    if (hasClass(node, className)) {
+      var originClass = node.className;
+      node.className = " ".concat(originClass, " ").replace(" ".concat(className, " "), ' ');
+    }
+  }
+}