How can I suppress all JavaScript runtime error popups, from the programmers side?
How to suppress all JavaScript runtime errors?
Asked Answered
To suppress all JavaScript errors there seems to be a window.onerror event.
If it is replaced as early as possible(e.g. right after the head) by a function which returns true - there will be no error popups, which is quite useful after debugging is done.
<head>
<script type="text/javascript">
window.onerror = function(message, url, lineNumber) {
// code to execute on an error
return true; // prevents browser error messages
};
</script>
...
Error Logging is possible too, as explained here
The HTMLDocumentEvents4::onerror event fires for run-time errors, but not for compilation errors. In addition, error dialog boxes raised by script debuggers are not suppressed by returning true. from MSDN –
Bioscope
This method doesn't seem to work for Angular 2.x+ apps - likely due to the Angular handling the errors itself. –
Loader
I made a little script for suppressing an error like "@" does in PHP.
Here is an example.
var at = function( test ) {
try {
if(typeof test === "function") return test();
else return test || null;
} catch (e) {
return null;
}
};
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try...catchblock. But it is better to fix errors ;) – Maestastry...catch, for example if some external library throws errors. Using window.onerror event is the solution in this case, see my answer – Revocable