javascript running error message

Preface

In daily programming, you may often encounter Javascript running error prompts. These error messages may leave you confused as to how to resolve them. This article will give you a detailed introduction to the types of Javascript running errors and common solutions.

1. TypeError Type Error

TypeError means that the variable or function uses the wrong type.

TypeError: X is not a function

This error message indicates that the program is trying to call a variable that is not a function.

TypeError: Cannot set property X of undefined

This error message indicates that the program is trying to set an undefined variable.

Usually, this error message is caused by the variable not being declared correctly. You can check your code to make sure the variables have been declared correctly. If that still doesn't work, you can try using the typeof operator for debugging.

2. SyntaxError Syntax Error

SyntaxError indicates that there is a syntax problem in the code.

SyntaxError: Unterminated string literal

This error message usually indicates that the string constant was not terminated correctly.

SyntaxError: Expected token X

This error message usually indicates that the code is missing key symbols.

SyntaxError: Unexpected token X

This error message usually indicates that the code uses unexpected symbols or the code is misunderstood.

Usually, this error message is caused by code writing errors. You can check your code to make sure the code symbols are correct. If that still doesn't work, you can try debugging using the JavaScript Statement Inspector.

3. ReferenceError Reference Error

ReferenceError means that the code wants to access a variable or function that does not exist.

ReferenceError: X is not defined

This error message usually indicates that the program is trying to access a variable that does not exist.

Usually, this error message is caused by the variable not being declared correctly. You can check your code to make sure the variables have been declared correctly. If that still doesn't work, you can try using the typeof operator for debugging.

4. RangeError Range Error

RangeError means that the code uses numbers outside the valid range.

RangeError: Invalid array length

This error message indicates that the program is trying to create an array with a negative length.

RangeError: Maximum call stack size exceeded

This error message indicates that the program keeps calling itself, causing the stack space to be exhausted.

Usually, this error message is caused by incorrect use of numbers. You can check your code to make sure the range of numbers is correct. If that still doesn't work, you can try debugging using JavaScript debugging tools.

5. Error type error

Error represents an error of unknown type.

Error: Something went wrong

This error message means that the program cannot recognize the type of error, so Error is used.

Usually, this error message is caused by a code error. You can check your code to make sure it is correct.

Conclusion

This article introduces several types and solutions to JavaScript running errors. When encountering these error prompts, you can first try to check the code or use debugging tools to solve it. If you still can't solve it, you can seek help from other programmers. Hope this article is helpful to everyone.

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