first add files

ProjectLiaisonForm/pages/dropdown-menu/tree/index.js

@@ -0,0 +1,41 @@
+const chineseNumber = '一二三四五六七八九十'.split('');
+
+const generateTree = function (deep = 0, count = 10, prefix) {
+  const ans = [];
+
+  for (let i = 0; i < count; i += 1) {
+    const value = prefix ? `${prefix}-${i}` : `${i}`;
+    const rect = {
+      label: `选项${chineseNumber[i]}`,
+      value,
+    };
+
+    if (deep > 0) {
+      rect.options = generateTree(deep - 1, 10, value);
+    }
+    ans.push(rect);
+  }
+
+  return ans;
+};
+
+Component({
+  data: {
+    doubleColumnsTree: {
+      options: generateTree(1),
+      value: ['0', '0-0'],
+    },
+    tripleColumnsTree: {
+      options: generateTree(2),
+      value: ['0', '0-0', ['0-0-0', '0-0-1']],
+    },
+  },
+
+  methods: {
+    handleTreeSelect(e) {
+      this.setData({
+        'doubleColumnsTree.value': e.detail.value,
+      });
+    },
+  },
+});