हम टाइपस्क्रिप्ट को समझने के लिए इसमें टाइपस्क्रिप्ट के साथ एक वेनिला वाइट प्रोजेक्ट का उपयोग कर रहे हैं और सभी चीजों को स्टोर करने के लिए एक लोकलस्टोरेज का उपयोग कर रहे हैं।

     
     
     
     
     



     


          


               
My Todo List

          

               
               Add
          

          

               
          

     



     

.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);