@office-open/xml

@office-open/xml

XML parsing and serialization for Office Open XML. Zero dependencies, drop-in replacement for xml + xml-js.

Features

• Zero Dependencies - No external runtime dependencies, pure TypeScript implementation
• xml() Serialization - Drop-in replacement for the xml package
• xml2js() Parsing - Drop-in replacement for xml-js XML parsing
• js2xml() Stringifying - Drop-in replacement for xml-js JS-to-XML conversion
• toElement() Direct Convert - Direct conversion from xml object format to xml-js Element, 10-19x faster than the xml→xml2js bridge
• Complete Type Definitions - Full type compatibility with xml and xml-js, import without changes
• OOXML Optimized - Implements all options needed for Office Open XML document generation

Installation

# pnpm
pnpm add @office-open/xml

# npm
npm install @office-open/xml

# yarn
yarn add @office-open/xml

# bun
bun add @office-open/xml

Migration from xml + xml-js

Replace your existing imports:

// Before
import xml from "xml";
import { xml2js, js2xml } from "xml-js";
import type { Element } from "xml-js";

// After
import { xml, xml2js, js2xml } from "@office-open/xml";
import type { Element } from "@office-open/xml";

No other code changes needed. All options and output formats are compatible.

Quick Start

import { xml, xml2js, js2xml, toElement } from "@office-open/xml";

// Serialize JS objects to XML
const xmlStr = xml({ "w:p": [{ _attr: { "w:val": "1" } }, { "w:r": [{ "w:t": "Hello" }] }] });
// <w:p w:val="1"><w:r><w:t>Hello</w:t></w:r></w:p>

// Parse XML to JS objects
const parsed = xml2js("<w:t>Hello</w:t>", { compact: false });

// Convert JS objects back to XML
const output = js2xml(parsed);

// Direct conversion (faster than xml → xml2js bridge)
const element = toElement({
  "w:p": [{ _attr: { "w:val": "1" } }, { "w:r": [{ "w:t": "Hello" }] }],
});

API

xml(input, options?)

Serialize JavaScript objects to XML string. Compatible with the xml package.

xml2js(xmlString, options?)

Parse XML string to JavaScript object. Compatible with xml-js.

js2xml(jsObject, options?)

Convert JavaScript object (xml-js Element format) to XML string. Compatible with xml-js.

json2xml(jsObject, options?)

Alias for js2xml.

xml2json(xmlString, options?)

Convenience function that returns JSON.stringify(xml2js(xmlString, options)).

toElement(input)

Direct conversion from xml object format to xml-js Element format. Much faster than the xml() → xml2js() bridge path.

escapeXml(str) / escapeAttributeValue(str)

Low-level XML entity escaping functions.

Benchmark

Performance comparison against original xml (1.0.1) and xml-js (1.6.11) packages:

Serialization (xml)

Scenario	@office-open/xml	xml	Speedup
Simple element	5,440,771 hz	805,545 hz	6.75x
Nested element	1,050,272 hz	315,184 hz	3.33x
Nested with declaration	967,945 hz	275,684 hz	3.51x

Parsing (xml2js)

Scenario	@office-open/xml	xml-js	Speedup
Simple XML	869,965 hz	100,507 hz	8.66x
Complex OOXML	346,440 hz	53,621 hz	6.46x
With captureSpaces	344,586 hz	52,414 hz	6.57x

Stringifying (js2xml)

Scenario	@office-open/xml	xml-js	Speedup
Simple element	793,710 hz	207,730 hz	3.82x
Complex OOXML	366,515 hz	135,815 hz	2.70x

Direct Conversion (toElement vs bridge)

Scenario	toElement()	xml() + xml2js() bridge	Speedup
Simple	15,471,913 hz	1,073,016 hz	14.42x
Nested	4,278,499 hz	441,468 hz	9.69x

Bundle Size

	@office-open/xml	xml + xml-js
gzip	4.22 kB	~15 kB

License

• MIT © Demo Macro