dist/exceptionless.universal.js
function installGlobalHandler() {
        if (_onErrorHandlerInstalled === true) {
            return;
        }

        _oldOnerrorHandler = window.onerror;
        window.onerror = traceKitWindowOnError;
        _onErrorHandlerInstalled = true;
    }
function installGlobalHandler() {
        if (_onErrorHandlerInstalled === true) {
            return;
        }

        _oldOnerrorHandler = window.onerror;
        window.onerror = traceKitWindowOnError;
        _onErrorHandlerInstalled = true;
    }
function installGlobalHandler ( ) { if ( _onErrorHandlerInstalled === true ) { return ; } _oldOnerrorHandler = window . onerror ; window . onerror = traceKitWindowOnError ; _onErrorHandlerInstalled = true ; }
Install a global onerror handler
@memberof TraceKit.report
Install a global onerror handler