feat(projects): 新增Django综合案例示例代码及素材

projects/web-django/todolist/static/js/main.js

@@ -0,0 +1,16 @@
+const addTaskButton = document.querySelector(".btn-add-task");
+const formDiv = document.querySelector(".task-form");
+const taskStatus = document.querySelector(".task-status");
+const updateOp = document.querySelector(".update-op");
+
+// show task form
+if (addTaskButton) {
+  addTaskButton.addEventListener("click", () => {
+    // use inline style to override css property.
+    if (formDiv.style.display === "") {
+      formDiv.style.display = "none";
+    }
+    formDiv.style.display =
+      formDiv.style.display == "none" ? "flex" : "none";
+  });
+}