40 lines
1.2 KiB
JavaScript
40 lines
1.2 KiB
JavaScript
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// Global error boundary.
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//
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// Surfaces uncaught errors and unhandled promise rejections as a terse,
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// throttled toast instead of failing silently — the full detail always goes to
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// the console. Intentionally dependency-free so an error handler can never
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// itself fail to load.
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let lastShown = 0;
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/** @param {string} message */
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function showToast(message) {
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const now = Date.now();
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if (now - lastShown < 4000) return; // throttle bursts of related errors
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lastShown = now;
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const el = document.createElement('div');
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el.className = 'error-toast';
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el.setAttribute('role', 'alert');
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el.textContent = message;
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document.body.appendChild(el);
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requestAnimationFrame(() => el.classList.add('is-visible'));
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setTimeout(() => {
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el.classList.remove('is-visible');
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setTimeout(() => el.remove(), 300);
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}, 5000);
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}
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const GENERIC = 'Something went wrong. Please try again.';
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window.addEventListener('error', (event) => {
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console.error('[error-boundary]', event.error || event.message);
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showToast(GENERIC);
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});
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window.addEventListener('unhandledrejection', (event) => {
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console.error('[error-boundary] unhandled rejection:', event.reason);
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showToast(GENERIC);
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});
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