|
| 1 | +(() => { |
| 2 | + const STORAGE_KEY = 'todo.list.items.v1'; |
| 3 | + |
| 4 | + /** @type {{ id: string; text: string; completed: boolean }[]} */ |
| 5 | + let items = []; |
| 6 | + |
| 7 | + const form = document.getElementById('todo-form'); |
| 8 | + const input = document.getElementById('todo-input'); |
| 9 | + const list = document.getElementById('todo-list'); |
| 10 | + const clearCompletedBtn = document.getElementById('clear-completed'); |
| 11 | + |
| 12 | + function load() { |
| 13 | + try { |
| 14 | + const raw = localStorage.getItem(STORAGE_KEY); |
| 15 | + items = raw ? JSON.parse(raw) : []; |
| 16 | + if (!Array.isArray(items)) items = []; |
| 17 | + } catch { items = []; } |
| 18 | + } |
| 19 | + |
| 20 | + function save() { |
| 21 | + localStorage.setItem(STORAGE_KEY, JSON.stringify(items)); |
| 22 | + } |
| 23 | + |
| 24 | + function createItem(text) { |
| 25 | + return { id: String(Date.now()) + Math.random().toString(36).slice(2), text, completed: false }; |
| 26 | + } |
| 27 | + |
| 28 | + function render() { |
| 29 | + list.innerHTML = ''; |
| 30 | + for (const item of items) { |
| 31 | + const li = document.createElement('li'); |
| 32 | + li.className = 'todo-item'; |
| 33 | + li.dataset.id = item.id; |
| 34 | + |
| 35 | + const checkbox = document.createElement('input'); |
| 36 | + checkbox.type = 'checkbox'; |
| 37 | + checkbox.className = 'todo-check'; |
| 38 | + checkbox.checked = item.completed; |
| 39 | + |
| 40 | + const p = document.createElement('p'); |
| 41 | + p.className = 'todo-text' + (item.completed ? ' completed' : ''); |
| 42 | + p.textContent = item.text; |
| 43 | + |
| 44 | + const del = document.createElement('button'); |
| 45 | + del.className = 'delete-btn'; |
| 46 | + del.type = 'button'; |
| 47 | + del.textContent = 'Delete'; |
| 48 | + |
| 49 | + li.appendChild(checkbox); |
| 50 | + li.appendChild(p); |
| 51 | + li.appendChild(del); |
| 52 | + list.appendChild(li); |
| 53 | + } |
| 54 | + } |
| 55 | + |
| 56 | + function addItem(text) { |
| 57 | + const trimmed = text.trim(); |
| 58 | + if (!trimmed) return; |
| 59 | + items.unshift(createItem(trimmed)); |
| 60 | + save(); |
| 61 | + render(); |
| 62 | + } |
| 63 | + |
| 64 | + function deleteItem(id) { |
| 65 | + items = items.filter(i => i.id !== id); |
| 66 | + save(); |
| 67 | + render(); |
| 68 | + } |
| 69 | + |
| 70 | + function toggleItem(id, completed) { |
| 71 | + const item = items.find(i => i.id === id); |
| 72 | + if (!item) return; |
| 73 | + item.completed = completed; |
| 74 | + save(); |
| 75 | + render(); |
| 76 | + } |
| 77 | + |
| 78 | + function clearCompleted() { |
| 79 | + items = items.filter(i => !i.completed); |
| 80 | + save(); |
| 81 | + render(); |
| 82 | + } |
| 83 | + |
| 84 | + form.addEventListener('submit', (e) => { |
| 85 | + e.preventDefault(); |
| 86 | + addItem(input.value); |
| 87 | + input.value = ''; |
| 88 | + input.focus(); |
| 89 | + }); |
| 90 | + |
| 91 | + list.addEventListener('click', (e) => { |
| 92 | + const target = e.target; |
| 93 | + if (!(target instanceof HTMLElement)) return; |
| 94 | + const li = target.closest('.todo-item'); |
| 95 | + if (!li) return; |
| 96 | + const id = li.dataset.id; |
| 97 | + if (!id) return; |
| 98 | + if (target.classList.contains('delete-btn')) { |
| 99 | + deleteItem(id); |
| 100 | + } |
| 101 | + }); |
| 102 | + |
| 103 | + list.addEventListener('change', (e) => { |
| 104 | + const target = e.target; |
| 105 | + if (!(target instanceof HTMLInputElement)) return; |
| 106 | + if (!target.classList.contains('todo-check')) return; |
| 107 | + const li = target.closest('.todo-item'); |
| 108 | + if (!li) return; |
| 109 | + const id = li.dataset.id; |
| 110 | + if (!id) return; |
| 111 | + toggleItem(id, target.checked); |
| 112 | + }); |
| 113 | + |
| 114 | + clearCompletedBtn.addEventListener('click', () => { |
| 115 | + clearCompleted(); |
| 116 | + }); |
| 117 | + |
| 118 | + load(); |
| 119 | + render(); |
| 120 | +})(); |
| 121 | + |
| 122 | + |
0 commit comments