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XMLParser moves #text into the unpairedTag node #785
Description
- 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?
- Have you checked the docs for helpful APIs and examples?
Description
If the next sibling node after a tag declared as unpaired (by unpairedTags option) is simple #text, it will be moved as a child during parsing. When passing such an object to XMLBuilder to restore the original XHTML, such text will be cut out.
<p>hello<br>world</p>This does NOT reproduce if the node following unpaired is followed by a tag. For example:
<p>hello<br><b>world</b></p>It also does NOT reproduce if the unpaired node contains a closing slash:
<p>hello<br/>world</p>Code
import { XMLParser, XMLBuilder } from 'fast-xml-parser'
const html = `
<!DOCTYPE html>
<html lang="en">
<head>
<title>Fast XML Parser</title>
<meta charset="UTF-8">
</head>
<body>
<p>
hello
<br>
world
</p>
</body>
</html>`
const parsingOptions = {
ignoreAttributes: false,
preserveOrder: true,
unpairedTags: ["hr", "br", "link", "meta"],
};
const parser = new XMLParser(parsingOptions);
let result = parser.parse(html);
console.log(JSON.stringify(result, null, 2))
const builderOptions = {
ignoreAttributes: false,
preserveOrder: true,
suppressEmptyNode: true,
unpairedTags: ["hr", "br", "link", "meta"],
}
const builder = new XMLBuilder(builderOptions);
const output = builder.build(result);
console.log(output)Output
jObj
[
{
"html": [
{
"head": [
{
"title": [
{
"#text": "Fast XML Parser"
}
]
},
{
"meta": [],
":@": {
"@_charset": "UTF-8"
}
}
]
},
{
"body": [
{
"p": [
{
"#text": "hello"
},
{
"br": [
{
"#text": "world"
}
]
}
]
}
]
}
],
":@": {
"@_lang": "en"
}
}
]xmlOutput
<html lang="en"><head><title>Fast XML Parser</title><meta charset="UTF-8"></head><body><p>hello<br></p></body></html>expected data
jObj
[
{
"html": [
{
"head": [
{
"title": [
{
"#text": "Fast XML Parser"
}
]
},
{
"meta": [],
":@": {
"@_charset": "UTF-8"
}
}
]
},
{
"body": [
{
"p": [
{
"#text": "hello"
},
{
"br": []
},
{
"#text": "world"
}
]
}
]
}
],
":@": {
"@_lang": "en"
}
}
]xmlOutput
<html lang="en"><head><title>Fast XML Parser</title><meta charset="UTF-8"></head><body><p>hello<br>world</p></body></html>Would you like to work on this issue?
- Yes
- No
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Activity
levensta commentedon Feb 15, 2026
@amitguptagwl Please take a look at this issue 🙏
[-]XMLParser moves #text to the unpairedTag node[/-][+]XMLParser moves #text into the unpairedTag node[/+]fix (#785) unpairedTag node should not have tag content
amitguptagwl commentedon Feb 25, 2026
Thanks for reporting. Issue is fixed in v5.4.1