first commit

src/composables/useContextMenu.ts

@@ -0,0 +1,21 @@
+import { ref } from 'vue';
+
+export const contextMenu = ref({
+  show: false,
+  x: 0,
+  y: 0,
+  anchor: 'top left',
+  self: 'top left',
+  node: null,
+});
+
+export function openContextMenu(event: MouseEvent, node: undefined) {
+  contextMenu.value = {
+    show: true,
+    x: event.clientX,
+    y: event.clientY,
+    anchor: 'top left',
+    self: 'top left',
+    node: node ?? null,
+  };
+}