diff --git a/JavaScript/4-class.js b/JavaScript/4-class.js
new file mode 100644
index 0000000..3948604
--- /dev/null
+++ b/JavaScript/4-class.js
@@ -0,0 +1,62 @@
+'use strict';
+
+class Node {
+
+  constructor(parent, name, data) {
+    this.name = name;
+    this.data = data;
+    this.childs = [];
+    if (parent) {
+      this.parent = parent;
+      parent.childs.push(this);
+    }
+  }
+
+  findAll(name) { // Find all nodes with specified name
+    const arr = [];
+    if (this.name === name) arr.push(this);
+    let i;
+    for (i = 0; i < this.childs.length; i++) {
+      arr.push.apply(arr, this.childs[i].findAll(name));
+    }
+
+    return arr;
+  }
+
+  findFirst(name) { //Find first instance
+    if (this.name === name) return this;
+    let i;
+    for (i = 0; i < this.childs.length; i++) {
+      return this.childs[i].findFirst(name);
+    }
+  }
+
+  find(name, callback) { //Call function for each found node
+    const nodes = this.findAll(name);
+    if (nodes.length > 0) {
+      let i;
+      const found = this.findAll(name);
+      for (i = 0; i < found.length; i++) {
+        callback(found[i]);
+      }
+    }
+  }
+
+  setParent(newParent) { // Sets new parent for this node
+    this.parent.childs.pop(this.parent.childs.indexOf(this));
+    this.parent = newParent;
+    this.parent.childs.push(this);
+  }
+}
+
+const root = new Node(null, 'root', {});
+const n1 = new Node(root, 'searched', {});
+const n2 = new Node(root, 'n2', {});
+const n12 = new Node(n1, 'searched', {});
+
+
+console.log('findAll("searched") -', root.findAll('searched'));
+console.log('findFirst("searched") -', root.findFirst('searched'));
+root.find('n2', n => console.log('parent - ', n.parent));
+n12.setParent(root);
+console.log('n12 new parent -', n12.parent);