Javascript Script Src Error
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Javascript Script Error Message
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Script Onerror
million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to tell if a script tag failed to load up vote 77 down vote favorite 22 I'm dynamically adding script error line 0 char 0 code 0 script tags to a page's
, and I'd like to be able to tell whether the loading failed in some way -- a 404, a script error in the loaded script, whatever. In Firefox, this works: var script_tag = document.createElement('script'); script_tag.setAttribute('type', 'text/javascript'); script_tag.setAttribute('src', 'http://fail.org/nonexistant.js'); script_tag.onerror = function() { alert("Loading failed!"); } document.getElementsByTagName('head')[0].appendChild(script_tag); However, this doesn't work in IE or Safari. Does anyone know of a way to make this work in browsers other qunit script error. source 0 than Firefox? (I don't think a solution that requires placing special code within the .js files is a good one. It's inelegant and inflexible.) javascript onerror script-tag share|improve this question edited Feb 13 '09 at 6:02 asked Feb 11 '09 at 20:57 David 2,39411517 4 Big website, automatic loading of dependencies for content loaded through ajax. if+polling is annoying cruft that I don't want to have to put into all JS. –David Feb 11 '09 at 21:49 2 You might also want to check for load failure when making a JSONP request using script tag injection... –schellsan Jan 23 '12 at 17:57 add a comment| 13 Answers 13 active oldest votes up vote 29 down vote There is no error event for the script tag. You can tell when it is successful, and assume that it has not loaded after a timeout: share|improve this answer edited Feb 11 '09 at 21:17 answered Feb 11 '09 at 21:12 Diodeus 82.4k24115146 5 The "onload" listener will be fired even if there's a javascript error. –Luca Matteis Feb 11 '09 at 21:38 26 Well, yes if the file LOADS and there is an error in the file itself, but if the file is not served up, the onload will never fire. –Diodalmost a year ago. If you look at any javascript error report, you will see a cryptic error polluting the reports under the name "Script
Script Crossorigin
error." without any information about the error. This happens in Firefox, Safari, safari script virus and Chrome when an exception violates the browser's same-origin policy - i.e. when the error occurs in a script
Script Error Google Chrome
that's hosted on a domain other than the domain of the current page. This tech post details how you can fix this error and decrypt the error message. Table of Contents http://stackoverflow.com/questions/538745/how-to-tell-if-a-script-tag-failed-to-load Background Why does the browser say "Script error." instead of something meaningful ? How do I fix the "Script error." ? Server Client Example Setup HTML CDN JS "Script error." demo without CORS Actual JS Error with CORS enabled Related articles on web Background The "Script error." happens in Firefox, Safari, and Chrome when an exception violates the browser's same-origin policy - i.e., http://ravikiranj.net/posts/2014/code/how-fix-cryptic-script-error-javascript/ when the error occurs in a script that's hosted on a domain other than the domain of the current page. This is a very common scenario when the javascript served on a webpage is hosted on a CDN (Content Delivery Network) such as Akamai where the domain of the javascript file is different from the webpage that is including the JS and running it. This behavior is intentional. It prevent scripts from leaking information to external domains. For an example, imagine that you accidentally visited a site called evilsite.com that serves a script pointing to your bank's home page such as "mybank.com/index.html". 1 Please note that the script tag is pointing to an html file rather than JavaScript. This will result in a script error, but the error might be interesting because it might tell us if you are logged in or not. Imagine that if you're logged in, the error spitted out might be something like "Welcome Ravi.. is undefined", whereas if you're not logged in, it might be "Please Login ... is undefined" or something similar. If evilsite.com does this for t
send to the https://blog.sentry.io/2016/05/17/what-is-script-error.html onerror callback when an error originates from a JavaScript file served from a different origin (different domain, port, or protocol). It’s painful because even though there’s an error occurring, you don’t know what the error is, nor from which code it’s script error originating. And that’s the whole purpose of window.onerror – getting insight into uncaught errors in your application. The cause: cross-origin scripts To better understand what’s going on, consider the following example HTML document, hypothetically served from http://example.com/test: