Saya mencipta Aplikasi Todo dalam Typescript Dengan Save Todos dalam Storan Tempatan-tutorial css-php.cn

Saya mencipta Aplikasi Todo dalam Typescript Dengan Save Todos dalam Storan Tempatan

王林

Lepaskan： 2024-07-17 08:42:28

asal

975 orang telah melayarinya

I create a Todo Application in Typescript With Save Todos in Local Storage

kami menggunakan projek vanilla vite dengan skrip taip dalam ini untuk memahami skrip taip dan menggunakan storan setempat untuk menyimpan todos.

<!doctype html>
<html lang="en">

<head>
     <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">
</head>

<body>
     <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>
</body>

</html>

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.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;
}

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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);

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