CODEWITHSUNDEEP
javascriptjqueryerror-handling
Fizer Khan
Fizer Khan

Reputation: 92935

window.onerror and javascript console errors

I have following code to capture errors in javascript

<script type="text/javascript">
   window.onerror = function(msg, url, linenumber) {
      console.log('Error message: '+msg+'\nURL: '+url+'\nLine Number: '+linenumber);
      return true;
   }
</script>

I opened chrome developer console and going to generate ReferenceError by random javascript code. Lets say:

person.run();  // person object does not exist

It throws Uncaught ReferenceError: person is not defined and printed in the console. But it is not captured by window.onerror. Why?

Upvotes: 7

Views: 8027

Answers (2)

AlexeyP0708
AlexeyP0708

Reputation: 432

For console or for other browser app

 document.onerror=function (errorMsg, url, lineNumber,colNumder,error){
    console.log('OnError');
     return true
}

function consoleErrorTrap(call){
    try{
        return call();
    } catch(e){
        let event= new ErrorEvent('error',{error:e})
        document.dispatchEvent(event);
    }   
}

consoleErrorTrap(()=>{
    throw new Error()
})

Upvotes: 0

pathik devani
pathik devani

Reputation: 530

An event handler for runtime script errors.

Note that some/many error events do not trigger window.onerror, you have to listen for them specifically.

open this link this is use full for you:

https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers.onerror

Upvotes: 3

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