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// DO NOT IMPORT window.config HERE!
// to make sure the error handler always works, we should never import `window.config`, because
// some user's custom template breaks it.
import type {Intent} from './types.ts';
// This sets up the URL prefix used in webpack's chunk loading.
// This file must be imported before any lazy-loading is being attempted.
__webpack_public_path__ = `${window.config?.assetUrlPrefix ?? '/assets'}/`;
function shouldIgnoreError(err: Error) {
const ignorePatterns = [
'/assets/js/monaco.', // https://github.com/go-gitea/gitea/issues/30861 , https://github.com/microsoft/monaco-editor/issues/4496
];
for (const pattern of ignorePatterns) {
if (err.stack?.includes(pattern)) return true;
}
return false;
}
export function showGlobalErrorMessage(msg: string, msgType: Intent = 'error') {
const msgContainer = document.querySelector('.page-content') ?? document.body;
const msgCompact = msg.replace(/\W/g, '').trim(); // compact the message to a data attribute to avoid too many duplicated messages
let msgDiv = msgContainer.querySelector<HTMLDivElement>(`.js-global-error[data-global-error-msg-compact="${msgCompact}"]`);
if (!msgDiv) {
const el = document.createElement('div');
el.innerHTML = `<div class="ui container js-global-error tw-my-[--page-spacing]"><div class="ui ${msgType} message tw-text-center tw-whitespace-pre-line"></div></div>`;
msgDiv = el.childNodes[0] as HTMLDivElement;
}
// merge duplicated messages into "the message (count)" format
const msgCount = Number(msgDiv.getAttribute(`data-global-error-msg-count`)) + 1;
msgDiv.setAttribute(`data-global-error-msg-compact`, msgCompact);
msgDiv.setAttribute(`data-global-error-msg-count`, msgCount.toString());
msgDiv.querySelector('.ui.message').textContent = msg + (msgCount > 1 ? ` (${msgCount})` : '');
msgContainer.prepend(msgDiv);
}
function processWindowErrorEvent({error, reason, message, type, filename, lineno, colno}: ErrorEvent & PromiseRejectionEvent) {
const err = error ?? reason;
const assetBaseUrl = String(new URL(__webpack_public_path__, window.location.origin));
const {runModeIsProd} = window.config ?? {};
// `error` and `reason` are not guaranteed to be errors. If the value is falsy, it is likely a
// non-critical event from the browser. We log them but don't show them to users. Examples:
// - https://developer.mozilla.org/en-US/docs/Web/API/ResizeObserver#observation_errors
// - https://github.com/mozilla-mobile/firefox-ios/issues/10817
// - https://github.com/go-gitea/gitea/issues/20240
if (!err) {
if (message) console.error(new Error(message));
if (runModeIsProd) return;
}
if (err instanceof Error) {
// If the error stack trace does not include the base URL of our script assets, it likely came
// from a browser extension or inline script. Do not show such errors in production.
if (!err.stack?.includes(assetBaseUrl) && runModeIsProd) return;
// Ignore some known errors that are unable to fix
if (shouldIgnoreError(err)) return;
}
let msg = err?.message ?? message;
if (lineno) msg += ` (${filename} @ ${lineno}:${colno})`;
const dot = msg.endsWith('.') ? '' : '.';
const renderedType = type === 'unhandledrejection' ? 'promise rejection' : type;
showGlobalErrorMessage(`JavaScript ${renderedType}: ${msg}${dot} Open browser console to see more details.`);
}
function initGlobalErrorHandler() {
if (window._globalHandlerErrors?._inited) {
showGlobalErrorMessage(`The global error handler has been initialized, do not initialize it again`);
return;
}
if (!window.config) {
showGlobalErrorMessage(`Gitea JavaScript code couldn't run correctly, please check your custom templates`);
}
// we added an event handler for window error at the very beginning of <script> of page head the
// handler calls `_globalHandlerErrors.push` (array method) to record all errors occur before
// this init then in this init, we can collect all error events and show them.
for (const e of window._globalHandlerErrors || []) {
processWindowErrorEvent(e);
}
// then, change _globalHandlerErrors to an object with push method, to process further error
// events directly
// @ts-expect-error -- this should be refactored to not use a fake array
window._globalHandlerErrors = {_inited: true, push: (e: ErrorEvent & PromiseRejectionEvent) => processWindowErrorEvent(e)};
}
initGlobalErrorHandler();
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