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02_SimpleTodo.html
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86 lines (64 loc) · 2.11 KB
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<body>
<h1>To-Do List</h1>
<input type="text" placeholder="Enter todo" id="taskInput" />
<button onclick="addTask()">Add task</button>
<ul id="taskList"></ul>
<script>
const existingTasks = JSON.parse(localStorage.getItem("tasks")) || []
displayTasks()
function addTask() {
const taskText = document.querySelector("#taskInput").value.trim()
if (taskText !== "") {
const newTask = {
id: Date.now(),
text: taskText,
}
existingTasks.push(newTask)
localStorage.setItem("tasks", JSON.stringify(existingTasks))
displayTasks()
document.querySelector("#taskInput").value = ""
}
}
function displayTasks() {
const taskList = document.querySelector("#taskList")
taskList.style.padding = "0"
taskList.innerHTML = ""
existingTasks.forEach((task) => {
const taskListItem = document.createElement("li")
taskListItem.style.width = "280px"
taskListItem.style.overflowWrap = "break-word"
taskListItem.dataset.id = task.id
taskListItem.innerHTML += `
${task.text}
<button onclick="editTask(${task.id})">Edit</button>
<button onclick="deleteTask(${task.id})">Delete</button>
`
taskList.appendChild(taskListItem)
})
}
function editTask(taskId) {
const taskToEditIndex = existingTasks.findIndex((task) => task.id === taskId)
if (taskToEditIndex !== -1) {
const taskToEdit = existingTasks[taskToEditIndex]
document.querySelector("#taskInput").value = taskToEdit.text
existingTasks.splice(taskToEditIndex, 1)
localStorage.setItem("tasks", JSON.stringify(existingTasks))
displayTasks()
}
}
function deleteTask(taskId) {
const updatedTasks = existingTasks.filter((task) => task.id !== taskId)
localStorage.setItem("tasks", JSON.stringify(updatedTasks))
existingTasks.splice(0, existingTasks.length, ...updatedTasks)
displayTasks()
}
</script>
</body>
</html>