Created
February 1, 2023 20:38
-
-
Save JoeyBurzynski/16bfa4bfe5619a6403599bd70a6356df to your computer and use it in GitHub Desktop.
JavaScript: Global onerror handler
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
window.addEventListener('error', function(e) { | |
var errorText = [ | |
e.message, | |
'URL: ' + e.filename, | |
'Line: ' + e.lineno + ', Column: ' + e.colno, | |
'Stack: ' + (e.error && e.error.stack || '(no stack trace)') | |
].join('\n'); | |
// Example: log errors as visual output into the host page. | |
// Note: you probably don't want to show such errors to users, or | |
// have the errors get indexed by Googlebot; however, it may | |
// be a useful feature while actively debugging the page. | |
var DOM_ID = 'rendering-debug-pre'; | |
if (!document.getElementById(DOM_ID)) { | |
var log = document.createElement('pre'); | |
log.id = DOM_ID; | |
log.style.whiteSpace = 'pre-wrap'; | |
log.textContent = errorText; | |
if (!document.body) document.body = document.createElement('body'); | |
document.body.insertBefore(log, document.body.firstChild); | |
} else { | |
document.getElementById(DOM_ID).textContent += '\n\n' + errorText; | |
} | |
// Example: log the error to remote service. | |
// Note: you can log errors to a remote service, to understand | |
// and monitor the types of errors encountered by regular users, | |
// Googlebot, and other crawlers. | |
var client = new XMLHttpRequest(); | |
client.open('POST', 'https://example.com/logError'); | |
client.setRequestHeader('Content-Type', 'text/plain;charset=UTF-8'); | |
client.send(errorText); | |
}); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment