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What is the best technique for catching ALL exceptions thrown within JavaScript? Obviously, the best technique is to use try...catch. But with ansynchronous callbacks and so forth, that can get tricky. I know IE and Gecko browsers support window.onerror, but what about Opera and Safari? Here are a bunch of test-cases that I would like to have a central exception handling solution for: // ErrorHandler-Test1 var test = null; test.arg = 5; // ErrorHandler-Test2 throw (new Error("Hello")); // ErrorHandler-Test3 throw "Hello again"; // ErrorHandler-Test4 throw { myMessage: "stuff", customProperty: 5, anArray: [1, 2, 3] }; // ErrorHandler-Test5 try { var test2 = null; test2.arg = 5; } catch(e) { ErrorHandler.handleError(e); } // ErrorHandler-Test6 try { throw (new Error("Goodbye")); } catch(e) { ErrorHandler.handleError(e); } // ErrorHandler-Test7 try { throw "Goodbye again"; } catch(e) { ErrorHandler.handleError(e); } // ErrorHandler-Test8 try { throw { myMessage: "stuff", customProperty: 5, anArray: [1, 2, 3] }; } catch(e) { ErrorHandler.handleError(e); } If you think of any other test-cases, please mention them. Several of these cases mention a ErrorHandler.handleError method. This is just a suggested guideline when using try...catch.

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