![]() TypeScript has the ability to throw a TypeError error the moment the function call executes with the string “4” instead of the number “4”. ” In this instance, the error is truly a variable type error. The user will be very confused if they receive an error message along the lines of “Invalid Number: ‘4’, jersey request should be one of. In this example, it doesn’t make sense to throw a RangeError if the input is a string version 4 or 13 since these aren’t invalid elements (they are mistyped). As an example, take a look at the following code: const numberGuesser = (numberGuess) => `) ![]() In addition, understanding the motivation behind a RangeError will help you understand how to quickly and easily recover when one is thrown by the JavaScript standard library or external dependencies. Understanding what a RangeError is, why one might be thrown, and when you should generate one yourself will help you write more expressive, correct code. In this instance, the number -100 would not be in the allowed input range and would cause a RangeError to be thrown. For example, if a function converts centimeters to inches, then the input range might be all the non-zero positive numbers. What is a RangeErrorĪ RangeError is used to convey to a user that a value was passed into a function that does not accept an input range that includes that value. You’ll also learn how to effectively deal with RangeErrors when they occur and, more importantly, how to mitigate the error in the future. In this article, you’ll learn all about RangeErrors and what causes them. ![]() The InternalError can also be mentioned here, but it’s currently not standard and not on track to become standard. Other standard errors include the AggregateError, EvalError, ReferenceError, Synta圎rror, TypeError, and URIError. A RangeError is one of the eight Error subtypes that are a part of the JavaScript standard built-in objects. ![]() If you’ve spent time developing in JavaScript, you’ve likely come across a RangeError. ![]()
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