implement onmounted for the web renderer

packages/interpreter/src/sledgehammer_bindings.rs

@@ -116,6 +116,10 @@ mod js {
     export function set_node(id, node) {
         nodes[id] = node;
     }
+    export function get_node(id) {
+        console.log(nodes, id);
+        return nodes[id];
+    }
     export function initilize(root, handler) {
         listeners.handler = handler;
         nodes = [root];
@@ -166,6 +170,9 @@ mod js {
         #[wasm_bindgen]
         pub fn set_node(id: u32, node: Node);
 
+        #[wasm_bindgen]
+        pub fn get_node(id: u32) -> Node;
+
         #[wasm_bindgen]
         pub fn initilize(root: Node, handler: &Function);
     }