How to show Angular project errors with a chrome extension

Question

I want to handle angular errors and exceptions with chrome extension

 

Here my manifest.json

{
/* declared name , version , etc... */
"background" : { "scripts" : ["background.js"] }
}

I have tried in two ways but it doesn't alert errors .

 

Here my background.js

 

> Method 1

window.onerror = function intercept (message, file, line, col, error) {
alert("Error occurred: " + message + " in file " + file + " at line " + line);
return false;
};

> Method 2

window.addEventListener('error', function(e) {
alert('handled uncaught error : ' , e); });

I know that i can implement ErrorHandler class but i want to do this suff with chrome extension

 

Please how to achieve that