• Are you running the latest version?
• Have you included sample input, output, error, and expected output?
• Have you checked if you are using correct configuration?
• Did you try online tool?

Description

The predefined entity seems to be parsed twice. < is expected to be parsed to $lt;. However, it is parsed again to <

Input

<SimpleScalarPropertiesInputOutput>
  <stringValue>&amp;lt;</stringValue>
</SimpleScalarPropertiesInputOutput>

Code

import { XMLParser } from "fast-xml-parser";

const encoded = `<SimpleScalarPropertiesInputOutput>
  <stringValue>&amp;lt;</stringValue>
</SimpleScalarPropertiesInputOutput>`;
const parser = new XMLParser({})
const parsed = parser.parse(encoded);

console.log(JSON.stringify(parsed, null, 2));

Output

{
  "SimpleScalarPropertiesInputOutput": {
    "stringValue": "<"
  }
}

expected data

{
  "SimpleScalarPropertiesInputOutput": {
    "stringValue": "<"
  }
}

Would you like to work on this issue?

• Yes
• No
  If with sufficient guidance.

It seems to be caused by replacing the escaped value with entity regex in a loop: