pure-todo/miniprogram/pages/list/list.ts

// pages/list/list.ts
interface ITodo {
  text: string;
  completed: boolean;
}

Component({
  data: {
    newTodoText: '',
    todos: [] as ITodo[],
    activeTab: 'list', // For tab bar
  },
  methods: {
    onNewTodoInput(e: any) {
      this.setData({
        newTodoText: e.detail.value,
      });
    },
    addTodo() {
      const { newTodoText, todos } = this.data;
      if (newTodoText.trim() === '') {
        return;
      }
      const newTodos = [...todos, { text: newTodoText, completed: false }];
      this.setData({
        todos: newTodos,
        newTodoText: '',
      });
    },
    toggleTodo(e: any) {
      const index = e.currentTarget.dataset.index;
      const { todos } = this.data;
      const newTodos = todos.map((todo, i) => {
        if (i === index) {
          return { ...todo, completed: !todo.completed };
        }
        return todo;
      });
      this.setData({
        todos: newTodos,
      });
    },
    removeTodo(e: any) {
      const index = e.currentTarget.dataset.index;
      const { todos } = this.data;
      const newTodos = todos.filter((_, i) => i !== index);
      this.setData({
        todos: newTodos,
      });
    },
    onTabChange(e: any) {
      const targetPage = e.detail.value;
      if (targetPage === 'home') {
        wx.switchTab({ url: '/pages/index/index' });
      } else if (targetPage === 'settings') {
        wx.switchTab({ url: '/pages/settings/settings' });
      }
      // No need to navigate if already on 'list'
    },
  },
});