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javascript Programming Glossary: error.prototypeHow do I create a custom Error in JavaScript? http://stackoverflow.com/questions/783818/how-do-i-create-a-custom-error-in-javascript Error.apply this arguments NotImplementedError.prototype new Error var nie new NotImplementedError some message console.log.. Update your code to assign your prototype to the Error.prototype and the instanceof and your asserts work. function NotImplementedError.. NotImplementedError this.message message NotImplementedError.prototype Error.prototype However I would just throw your own object and..
Inheriting from the Error object - where is the message property? http://stackoverflow.com/questions/8802845/inheriting-from-the-error-object-where-is-the-message-property MyError msg Error.call this msg this.name MyError MyError.prototype.__proto__ Error.prototype var error new Error message error.message.. this msg this.name MyError MyError.prototype.__proto__ Error.prototype var error new Error message error.message message var myError.. specific v8 chrome node.js behave like this. Also MyError.prototype.__proto__ Error.prototype is a bad practice. Use MyError.prototype..
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