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Learn how to troubleshoot and fix issues with your HTML and JavaScript buttons. Get your palindromes finder up and running in no time!
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This video is based on the question https://stackoverflow.com/q/74539493/ asked by the user 'Ahmed Kharrat' ( https://stackoverflow.com/u/17255636/ ) and on the answer https://stackoverflow.com/a/74539916/ provided by the user 'tezarsurya' ( https://stackoverflow.com/u/20538454/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Fix Your HTML JavaScript Button Not Working?

When you're diving into web development, encountering bugs or issues is a common occurrence. One frustrating challenge many newcomers experience is when a JavaScript button on their HTML page doesn't seem to work. This issue may arise when trying to implement a feature like finding palindrome words in a given string. In this post, we'll walk through a common scenario where the button fails to deliver results, and how to fix it effectively.

The Problem at Hand

Imagine you're working on a project that requires a user to input a string, and you want to return any palindrome words they entered. You have a button to initiate this task, but it's mysteriously doing nothing when clicked. This can be an annoyance, especially when you're eager to see your code in action.

Here's the basic structure of your HTML and JavaScript that you're working with:

HTML Structure

[[See Video to Reveal this Text or Code Snippet]]

JavaScript Code

[[See Video to Reveal this Text or Code Snippet]]

Diagnosing the Issues

Upon reviewing the provided code, there are a couple of notable issues that need to be addressed:

Incorrect Indexing: Within the findClick() function, the index variable i is used instead of j, which leads to the wrong elements being referenced.

Undefined Element Reference: The line document.getElementById('palindromes').innerHTML = ""; is attempting to clear an element that doesn't exist in your HTML.

Variable Name Confusion: In the checker() function, you're referring to s, while you should be using x.

A Step-by-Step Solution

Let's implement the necessary corrections so your code works as intended. Here's the revised code:

Corrected HTML

The HTML remains the same, as it is already correctly structured.

Corrected JavaScript

Here’s the revised JavaScript code that resolves the prior issues:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of Changes

Loop Variable: Changed the loop index in findClick to correctly iterate through phraseList using j.

Element Clearing: Removed the unnecessary clearing of an undefined element.

Correct Parameter Use: Ensured the checker() function uses the correct variable for checking palindromes.

Conclusion

By addressing the bugs in your button functionality, you can successfully create a web page that identifies palindrome words from a user-input string. Testing your code after making changes is crucial, and debugging will become easier with practice. Now that you’ve debugging tips up your sleeve, your web development journey will surely be a smoother process.

Feel free to ask any further questions or share your own experiences debugging JavaScript and HTML!