| 1 | // Progressive enhancement for the reference fixture: every form in the app |
| 2 | // is submitted with fetch, and the server's re-rendered .todoapp replaces |
| 3 | // the current one. Editing in place is client-side until it saves. |
| 4 | const FETCH = { 'X-Requested-With': 'fetch' }; |
| 5 | |
| 6 | async function send(form) { |
| 7 | const res = await fetch(form.action, { |
| 8 | method: 'POST', |
| 9 | headers: FETCH, |
| 10 | body: new URLSearchParams(new FormData(form)), |
| 11 | }); |
| 12 | const doc = new DOMParser().parseFromString(await res.text(), 'text/html'); |
| 13 | document.querySelector('.todoapp').replaceWith(doc.querySelector('.todoapp')); |
| 14 | } |
| 15 | |
| 16 | document.addEventListener('submit', async (e) => { |
| 17 | const form = e.target; |
| 18 | if (!form.closest('.todoapp')) return; |
| 19 | e.preventDefault(); |
| 20 | // Leave editing mode first, so the focusout that follows doesn't save twice. |
| 21 | form.closest('li')?.classList.remove('editing'); |
| 22 | const adding = form.querySelector('.new-todo'); |
| 23 | await send(form); |
| 24 | if (adding) document.querySelector('.new-todo').focus(); |
| 25 | }); |
| 26 | |
| 27 | document.addEventListener('change', (e) => { |
| 28 | if (e.target.matches('.toggle, .toggle-all')) e.target.form.requestSubmit(); |
| 29 | }); |
| 30 | |
| 31 | document.addEventListener('dblclick', (e) => { |
| 32 | const label = e.target.closest('.todo-list label'); |
| 33 | if (!label) return; |
| 34 | const li = label.closest('li'); |
| 35 | li.classList.add('editing'); |
| 36 | const input = li.querySelector('.edit'); |
| 37 | input.focus(); |
| 38 | input.setSelectionRange(input.value.length, input.value.length); |
| 39 | }); |
| 40 | |
| 41 | document.addEventListener('keydown', (e) => { |
| 42 | if (!e.target.matches('.edit')) return; |
| 43 | const li = e.target.closest('li'); |
| 44 | if (e.key === 'Escape') { |
| 45 | e.target.value = li.querySelector('label').textContent; |
| 46 | li.classList.remove('editing'); |
| 47 | } |
| 48 | }); |
| 49 | |
| 50 | document.addEventListener('focusout', (e) => { |
| 51 | if (!e.target.matches('.edit')) return; |
| 52 | const li = e.target.closest('li'); |
| 53 | if (li.classList.contains('editing')) { |
| 54 | li.classList.remove('editing'); |
| 55 | e.target.form.requestSubmit(); |
| 56 | } |
| 57 | }); |
| 58 | |
amadan