我们使用带有打字稿的普通 vite 项目来理解打字稿，并使用本地存储来存储待办事项。

CSS婚礼策划服务机构宣传网站模板

CSS婚礼策划服务机构宣传网站模板是一款适合提供婚礼策划和婚庆服务机构宣传网站模板下载。提示：本模板调用到谷歌字体库，可能会出现页面打开比较缓慢。

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     <meta charset="utf-8"><link rel="icon" type="image/svg+xml" href="/vite.svg"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>vite + ts</title><link rel="stylesheet" href="./src/style.css"><div id="app">

          <div class="container">

               <h1>my todo list</h1>

          <form id="myform">
               <input required type="text" id="inputtodo" placeholder="enter todo"><button type="submit" id="btnsubmit">add</button>
          </form>

          <div class="todos-container">
               <!-- <div class="todo-item">
                    <input id="iscomplete" type="checkbox">
                    <p id="todotext">my today todo</p>
                    <button id="btndelete">x</button>
               </div> -->
          </div>

     </div>

</div>

     <script type="module" src="/src/main.ts"></script>

.container{
     max-width: 700px;
     margin-inline: auto;
     display: flex;
     align-items: center;
     justify-content: center;
     flex-direction: column;
}

form #inputtodo{
     padding: 8px 15px;
}

form #btnsubmit{
     padding: 8px 15px;
}

.todos-container{
     padding: 10px;
     width: 100%;
     width: fit-content;
}

.todo-item{
     padding: 5px;
     border: 1px solid gray;
     gap: 20px;
     width: 100%;
     display: flex;
     align-items: center;
}

.textcut{
     text-decoration: line-through;
}

interface Todo{
     content: string,
     isComplete: boolean,
     readonly id:string
}

let todos:Todo[] = [];

const todosContainer = document.querySelector('.todos-container')!;

function genrateTodo(id: string, content:string, isComplete:boolean){
     const itemContainer:HTMLDivElement = document.createElement('div');
     itemContainer.classList.add('todo-item');

     // checkbox
     const checkbox: HTMLInputElement = document.createElement('input');
     checkbox.type = "checkbox";
     checkbox.checked = isComplete
     checkbox.onchange = () => {
          todos.find(todo => {
               if(todo.id === id) todo.isComplete = checkbox.checked;

               // save updated todo
               localStorage.setItem('todos', JSON.stringify(todos));
          })
          todoText.className = checkbox.checked ? 'textCut' : '';
     }

     // paragraph content
     const todoText:HTMLParagraphElement = document.createElement('p');
     todoText.innerHTML = content;
     todoText.className = isComplete ? 'textCut' : '';

     // delete button
     const btnDelete: HTMLButtonElement = document.createElement('button');
     btnDelete.textContent = 'X';
     btnDelete.onclick = () => {
          todos = todos.filter(todo => todo.id !== id);
          localStorage.setItem('todos', JSON.stringify(todos));
          renderTodos(todos);
     }

     itemContainer.append(checkbox, todoText, btnDelete);
     todosContainer.appendChild(itemContainer);

}

// add todo
const form = document.getElementById('myForm')!;
form.onsubmit = (e: SubmitEvent) => {
     e.preventDefault();
     const inputElement = document.getElementById('inputTodo') as HTMLInputElement;
     let value:string = inputElement.value;

     const newTodo:Todo = {
          id: String(Math.random() * 1000),
          content: value,
          isComplete: false
     }

     todos.push(newTodo);
     inputElement.value = "";

     localStorage.setItem('todos', JSON.stringify(todos));

     renderTodos(todos);
}


function renderTodos(todos: Todo[]){
     todosContainer.innerHTML = "";
     todos.forEach(todo => {
          genrateTodo(todo.id, todo.content, todo.isComplete);
     })
}

const jsonTodos = localStorage.getItem('todos')!;
const storedTodos : Todo[] = JSON.parse(jsonTodos);
todos = storedTodos;
renderTodos(todos);