Bionic Reading Converter leaves placeholder HTML output after Clear

[baixiangcpp]

Summary

When Bionic Reading Converter is in HTML Snippet mode, clicking Clear empties the input but leaves <p>&nbsp;</p> in the output and keeps Copy/Download enabled. Switching to Markdown Text after that shows a truly empty output with Copy/Download disabled, so the behavior differs by format.

Reproduction

1. Open https://byteflow.tools/en/bionic-reading-converter.
2. Select HTML Snippet.
3. Enter:

Hello world! 123 testing.

4. Click Clear.

Actual result

• Input is empty.
• Output textbox contains <p>&nbsp;</p>.
• Copy and Download remain enabled.
• Clicking Copy returns <p>&nbsp;</p>.

If Markdown Text is selected after clearing, the output becomes empty and Copy/Download are disabled.

Expected result

Clear should remove the output for both formats and disable Copy/Download. An empty HTML output should be "", not a placeholder paragraph.

Impact

Downstream users can copy or download a non-empty HTML fragment after believing the converter was cleared. This can create blank paragraphs in generated documents or make stale output appear valid.

Environment

• Tool: Bionic Reading Converter
• URL: https://byteflow.tools/en/bionic-reading-converter
• Observed: 2026-08-18