A Developer's Guide to the XPath Evaluator

The XPath Evaluator is a powerful tool for developers who work with XML or HTML data. It allows you to write and test XPath expressions to navigate and select nodes from within a document, making it invaluable for web scraping, data extraction, and testing.

Features

• Dual Document Support: The tool can evaluate expressions against both XML and HTML documents. Simply select the input type.
• Live Evaluation: Run your XPath expression and see the matching nodes or values instantly in the result pane.
• Clear Results: The output displays the string representation of all matching nodes, separated for clarity. This can include full elements, text content, or attribute values.
• Syntax Highlighting: Both the input document editor and the results editor use the powerful Monaco Editor for excellent syntax highlighting, making complex documents easier to read.
• Error Handling: If your XML/HTML is malformed or your XPath expression has a syntax error, the tool will display a clear error message to help you debug.

How to Use

1. Select Input Type: Choose whether you are working with an XML or HTML document.
2. Provide Your Document: Paste your full XML or HTML source code into the document editor on the left.
3. Write Your XPath Expression: In the "XPath Expression" input field, write the query you want to test.
   • Example for XML: /bookstore/book/title
   • Example for HTML: //div[@id='main']/ul/li
4. Evaluate: Click the "Evaluate" button.
5. View the Result: The "Evaluation Result" editor on the right will be populated with all the nodes that matched your expression.
6. Copy: Use the "Copy Result" button to grab the output.