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Uncaught Error Syntax Error Unrecognized Expression Unsupported Pseudo Duplicate

Are you facing an "Uncaught Error Syntax Error: Unrecognized Expression Unsupported Pseudo Duplicate" issue while working on your code? Don't worry! This error may seem overwhelming at first, but with a bit of understanding and troubleshooting, you can quickly resolve it.

### What Does the Error Mean?
When you encounter the "Uncaught Error Syntax Error: Unrecognized Expression Unsupported Pseudo Duplicate" error, it typically indicates that there is a problem with the syntax of a pseudo-element selector in your code. Pseudo-elements are CSS selectors that allow you to style specific parts of an element, such as the first letter or line of text. If a pseudo-element selector is duplicated or not recognized correctly, it can trigger this error.

### Troubleshooting Steps:
# 1. Check for Duplicated Pseudo-Elements:
 Start by reviewing your code to identify any duplicated pseudo-element selectors. Look for instances where you may have accidentally repeated a pseudo-element selector, leading to a syntax error.

#### 2. Verify Pseudo-Element Syntax:
Ensure that the pseudo-element selector you are using is supported by the CSS specification. Some pseudo-elements have specific syntax requirements, so double-check your code to confirm that the syntax is correct.

#### 3. Test in Isolation:
To pinpoint the source of the error, try isolating the problematic code segment. You can comment out sections of your code and gradually reintroduce them to identify where the error occurs.

#### 4. Use Developer Tools:
Utilize browser developer tools to inspect the elements and styles on your webpage. This can help you identify any incorrect pseudo-element selectors and understand how they are affecting your layout.

### Example:

Html

<!-- Incorrect Usage -->

    p::before::after {
        content: "Error!";
    }


<!-- Corrected Usage -->

    p::before {
        content: "Hello ";
    }
    p::after {
        content: "!";
    }

### Conclusion:
By following these troubleshooting steps and paying attention to your code structure, you can overcome the "Uncaught Error Syntax Error: Unrecognized Expression Unsupported Pseudo Duplicate" issue. Remember, precision and accuracy are key when working with pseudo-elements in your CSS code. Happy coding, and may your coding journey be error-free!

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