67 lines
2.1 KiB
JavaScript
67 lines
2.1 KiB
JavaScript
export function initContactForm(form) {
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const status = form.querySelector('[data-form-status]');
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const submit = form.querySelector('[type="submit"]');
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const submitLabel = submit.innerHTML;
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function setFieldError(name, message) {
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const input = form.elements[name];
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const error = form.querySelector(`[data-error-for="${name}"]`);
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if (!input || !error) return;
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input.closest('.field').classList.toggle('field--invalid', Boolean(message));
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error.textContent = message || '';
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error.hidden = !message;
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if (message) {
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input.setAttribute('aria-invalid', 'true');
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input.setAttribute('aria-describedby', error.id);
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} else {
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input.removeAttribute('aria-invalid');
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input.removeAttribute('aria-describedby');
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}
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}
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function showStatus(message, kind) {
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status.textContent = message;
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status.className = `form-status form-status--${kind}`;
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status.hidden = false;
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}
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form.addEventListener('submit', async (event) => {
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event.preventDefault();
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form.querySelector('[role="alert"]')?.remove();
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for (const name of ['name', 'email', 'message']) setFieldError(name, null);
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status.hidden = true;
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submit.disabled = true;
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submit.textContent = form.dataset.sending;
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try {
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const response = await fetch(form.action, {
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method: 'POST',
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headers: { Accept: 'application/json' },
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body: new URLSearchParams(new FormData(form)),
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});
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const data = await response.json();
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if (data.ok) {
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const done = document.createElement('p');
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done.className = 'form-status form-status--ok';
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done.setAttribute('role', 'status');
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done.tabIndex = -1;
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done.textContent = data.message;
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form.replaceWith(done);
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done.focus();
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return;
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}
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for (const [name, message] of Object.entries(data.errors ?? {})) setFieldError(name, message);
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showStatus(data.message, 'error');
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form.querySelector('[aria-invalid="true"]')?.focus();
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} catch {
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showStatus(form.dataset.failed, 'error');
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} finally {
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submit.disabled = false;
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submit.innerHTML = submitLabel;
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}
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});
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}
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