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JavaScript Errors – Understanding and Correcting

JavaScript Errors – Understanding and Correcting

A short note about errors before we proceed to the next session.

When you are learning a new programming language it takes time to understand its syntax. Your code might have a few bugs; it’s okay as long as you know how to correct them.

JavaScript beginners mainly make three kinds of errors

  • They might try to call a variable that is not yet defined.
    Solution: Remember to always initialize all variables you expect to use in the script.

    JavaScript Error in Internet Explorer

  • Forgetting the starting or ending quote or parenthesis as in a method or function.
    Solution: Place the opening and ending parenthesis or quotes together, then write the code/text between them.

    JavaScript Error in Internet Explorer

    JavaScript Error in Internet Explorer

  • Using a property or method that does not belong to an object, for example, using document.alert() instead of window.alert().
    Solution: You don’t have to learn each and every object’s properties and methods at the very start… you’ll get the hang of it all gradually.

    JavaSCript Error in Internet Explorer

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