forgejo/web_src/js/bootstrap.js
wxiaoguang 5d09023f13
Avoid duplicate JS error messages on UI ()
Gitea treat JS errors seriously, so sometimes the JS errors caused by
3rdparty code (eg: browser extensions) would also be reported on Gitea
UI: TypeError: WeakMap key undefined (caused by extension DarkReader's
bug) 

To avoid fill the user's screen with a lot of error messages, this PR
merges the same error messages into one, like this:

```js
<div class="page-content">
  <div class="... js-global-error" data-global-error-msg-compact="testmsg1" data-global-error-msg-count="2">test msg 1 (2)</div>
  <div class="... js-global-error" data-global-error-msg-compact="testmsg2" data-global-error-msg-count="1">test msg 2</div>
</div>
```
2024-01-21 14:23:08 +00:00

64 lines
3.1 KiB
JavaScript

// 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.
// 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__ = `${window.config?.assetUrlPrefix ?? '/assets'}/`;
export function showGlobalErrorMessage(msg) {
const pageContent = document.querySelector('.page-content');
if (!pageContent) return;
// compact the message to a data attribute to avoid too many duplicated messages
const msgCompact = msg.replace(/\W/g, '').trim();
let msgDiv = pageContent.querySelector(`.js-global-error[data-global-error-msg-compact="${msgCompact}"]`);
if (!msgDiv) {
const el = document.createElement('div');
el.innerHTML = `<div class="ui container negative message center aligned js-global-error" style="white-space: pre-line;"></div>`;
msgDiv = el.childNodes[0];
}
// 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.textContent = msg + (msgCount > 1 ? ` (${msgCount})` : '');
pageContent.prepend(msgDiv);
}
/**
* @param {ErrorEvent} e
*/
function processWindowErrorEvent(e) {
if (e.type === 'unhandledrejection') {
showGlobalErrorMessage(`JavaScript promise rejection: ${e.reason}. Open browser console to see more details.`);
return;
}
if (!e.error && e.lineno === 0 && e.colno === 0 && e.filename === '' && window.navigator.userAgent.includes('FxiOS/')) {
// At the moment, Firefox (iOS) (10x) has an engine bug. See https://github.com/go-gitea/gitea/issues/20240
// If a script inserts a newly created (and content changed) element into DOM, there will be a nonsense error event reporting: Script error: line 0, col 0.
return; // ignore such nonsense error event
}
showGlobalErrorMessage(`JavaScript error: ${e.message} (${e.filename} @ ${e.lineno}:${e.colno}). 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
window._globalHandlerErrors = {_inited: true, push: (e) => processWindowErrorEvent(e)};
}
initGlobalErrorHandler();