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Copyright 2025, Mark Forscher */
/* ======================================================================================= */
import * as Sentry from '@sentry/browser';
export class Monitoring {
constructor() {
this.enabled = false;
this.dsn = null;
}
// Initialize Sentry error monitoring
init() {
// Check for Sentry DSN in environment or meta tag
// For static sites, DSN can be set via meta tag or build-time replacement
this.dsn = this.getDSN();
if (!this.dsn) {
console.log('Sentry monitoring disabled (no DSN configured)');
return;
}
try {
Sentry.init({
dsn: this.dsn,
// Set environment based on hostname
environment: this.getEnvironment(),
// Release version (can be set during build)
release: this.getRelease(),
// Performance monitoring sample rate (10% of transactions)
tracesSampleRate: 0.1,
// Error sample rate (100% - capture all errors)
sampleRate: 1.0,
// Integrations
integrations: [
// Breadcrumbs for debugging context
Sentry.breadcrumbsIntegration({
console: false, // Don't capture console logs as breadcrumbs
dom: true, // Capture DOM events
fetch: true, // Capture fetch requests
history: true, // Capture navigation
xhr: true // Capture XHR requests
}),
// Capture global errors
Sentry.globalHandlersIntegration({
onerror: true,
onunhandledrejection: true
})
],
// Before sending events, filter out noisy errors
beforeSend(event, hint) {
// Filter out browser extension errors
if (event.exception && event.exception.values) {
const message = event.exception.values[0]?.value || '';
// Ignore common third-party script errors
if (message.includes('chrome-extension://') ||
message.includes('moz-extension://') ||
message.includes('safari-extension://')) {
return null;
}
// Ignore Ad Blocker errors
if (message.includes('adsbygoogle') ||
message.includes('googleads')) {
return null;
}
}
// Anonymize IP address for privacy compliance
if (event.user) {
delete event.user.ip_address;
}
// Strip IP from request context
if (event.request) {
delete event.request.env?.REMOTE_ADDR;
}
return event;
},
// Ignore specific error URLs
ignoreErrors: [
// Browser extensions
'top.GLOBALS',
'chrome-extension',
'moz-extension',
// Facebook
'fb_xd_fragment',
// Random plugins/extensions
'instantSearchSDKJSBridgeClearHighlight',
// See: http://blog.errorception.com/2012/03/tale-of-unfindable-js-error.html
'Can\'t find variable: ZiteReader',
'jigsaw is not defined',
'ComboSearch is not defined',
// ISP injections
'atomicFindClose',
// Harmless errors
'ResizeObserver loop limit exceeded'
],
// Ignore errors from specific URLs
denyUrls: [
// Chrome extensions
/extensions\//i,
/^chrome:\/\//i,
/^chrome-extension:\/\//i,
// Facebook
/graph\.facebook\.com/i,
/connect\.facebook\.net\/en_US\/all\.js/i,
// Other plugins
/eatdifferent\.com\.woopra-ns\.com/i,
/static\.woopra\.com\/js\/woopra\.js/i
]
});
this.enabled = true;
console.log('Sentry monitoring initialized');
} catch (error) {
console.error('Failed to initialize Sentry:', error);
}
}
// Get Sentry DSN from meta tag or environment
getDSN() {
// Try meta tag first (for static sites)
const metaTag = document.querySelector('meta[name="sentry-dsn"]');
if (metaTag) {
return metaTag.content;
}
// For build-time replacement, you can use process.env
// This requires a bundler plugin to replace process.env.SENTRY_DSN
// with the actual value during build
Iif (typeof process !== 'undefined' && process.env && process.env.SENTRY_DSN) {
return process.env.SENTRY_DSN;
}
return null;
}
// Determine environment from hostname
getEnvironment() {
const hostname = window.location.hostname;
if (hostname === 'localhost' || hostname === '127.0.0.1') {
return 'development';
} else if (hostname.includes('.github.io')) {
return 'production';
} else if (hostname.includes('underafter.com')) {
return 'production';
} else {
return 'staging';
}
}
// Get release version from meta tag or package.json version
getRelease() {
const metaTag = document.querySelector('meta[name="version"]');
if (metaTag) {
return `underafter@${metaTag.content}`;
}
// Default release identifier
return 'underafter@unknown';
}
// Capture custom error
captureError(error, context = {}) {
if (!this.enabled) return;
Sentry.captureException(error, {
extra: context
});
}
// Capture custom message
captureMessage(message, level = 'info', context = {}) {
if (!this.enabled) return;
Sentry.captureMessage(message, {
level: level,
extra: context
});
}
// Set user context
setUser(user) {
if (!this.enabled) return;
Sentry.setUser(user);
}
// Add breadcrumb (for debugging context)
addBreadcrumb(breadcrumb) {
if (!this.enabled) return;
Sentry.addBreadcrumb(breadcrumb);
}
}
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