what are common java script errors?

JavaScript, a scripting language used in web pages, is notorious for its errors. Although JavaScript does help with making web pages interactive, understanding and being able to identify common JavaScript errors can be difficult for those who are not familiar with the language and its nuances.

JavaScript Errors are divided into Groups

There are two main categories of JavaScript errors, syntax errors (also known as parsing errors) and runtime errors. Syntax errors occur when the code contains incorrect grammar or spelling mistakes, while runtime errors occur when the code encounters an unexpected value that the script cannot interpret.

Common Syntax Errors in JavaScript

Syntax errors usually manifest themselves in a compilation or parse error message. These common mistakes include mistyping a keyword (like "var" instead of "let") and forgetting to include necessary quotation marks around string values. Syntax errors can also be caused by an improper application of functions such as forgetting to provide required arguments within the function call or providing too many arguments where not needed.

Common Runtime Errors in JavaScript

Unlike syntax errors, runtime errors occur after the program is running but before it is complete. These can be frustrating to debug because there may be other parts of the program that are interfering with the running of your code and cause unexpected behavior. Common runtime problems include incorrect data types being used as operands during computation, increasing references/pointers to memory locations that have gone out of scope or trying to access a property from an undefined object.

How To Debug Your Script Errors

Uncovering these pesky bugs can often be easier said than done. If you're experience problems related to any kind of script error then there are some debugging methods you should try:

- Double check your code for any typos or mistakes you may have made; ensure that all variable names and function names are spelled correctly, brackets are where they should be and you've included all necessary functions calls—including quotes around strings where required!

- For runtime issues in particular, use a technique called Console Logging. This is where you surround sections of your code with console logs so that it will output data into your browser's console which will give you additional insight into what's happening with certain variables at various points in time during execution. This makes it easier for us to track down any problems.

- A useful tool for debugging your scripts is a source-code debugger which allows you step through your program one line at a time—you can observe how each line is evaluated and view local variables values at each step which if invaluable when isolating why something isn't working how expected!

In Conclusion…

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