xml-formatter

Converts XML into a human readable format (pretty print) while respecting the xml:space attribute.

Reciprocally, the xml-formatter package can minify pretty printed XML.

The xml-formatter package can also be used on the browser using the browserified version with a small footprint.

Installation

$ npm install xml-formatter

Example

Usage:

import xmlFormat from 'xml-formatter';

xmlFormat('<root><content><p xml:space="preserve">This is <b>some</b> content.</content></p>');

Output:

<root>
    <content>
        <p xml:space="preserve">This is <b>some</b> content.</p>
    </content>
</root>

Options

• filter: Function to filter out unwanted nodes by returning false.
  • type: function(node) => boolean
  • default: () => true
• ignoredPaths: List of XML element paths to ignore during formatting. This can be a partial path (element tag name) or full path starting from the document element e.g. ['/html/head/script', 'pre'].
  • type: string[]
  • default: []
• indentation: The value used for indentation.
  • type: string
  • default: ' '
• collapseContent: True to keep content in the same line as the element. Only works if element contains at least one text node.
  • type: boolean
  • default: false
• lineSeparator: Specify the line separator to use.
  • type: string
  • default: \r\n
• whiteSpaceAtEndOfSelfclosingTag: True to end self-closing tags with a space e.g. <tag />.
  • type: boolean
  • default: false
• throwOnFailure: Throw an error when XML fails to parse and get formatted otherwise the original XML is returned.
  • type: boolean
  • default: true
• forceSelfClosingEmptyTag: True to force empty tags to be self-closing.
  • type: boolean
  • default: false
• attributeQuotes: The quote characters to use as attribute delimiters. Valid options are 'single' fo single quotes and 'double' for double quotes.
  • type: 'double|single'
  • default: 'double'

Usage:

import xmlFormat from 'xml-formatter';

xmlFormat('<root><!-- content --><content><p>This is <b>some</b> content.</content></p>', {
    indentation: '  ', 
    filter: (node) => node.type !== 'Comment', 
    collapseContent: true, 
    lineSeparator: '\n'
});

Output:

<root>
  <content>
    <p>This is <b>some</b> content.</p>
  </content>
</root>

Minify mode

Usage:

import xmlFormat from 'xml-formatter';

const xml = `
<root>
  <content>
    <p>
        This is <b>some</b> content.
    </p>
  </content>
</root>`;

xmlFormat.minify(xml, {
    filter: (node) => node.type !== 'Comment',
    collapseContent: true
});

Output:

<root><content><p>This is<b>some</b>content.</p></content></root>

On The Browser

The code is transpiled using Babel with @babel/preset-env default values and bundled using browserify.

Using require('xml-formatter')

Page:

<script type="text/javascript" src="dist/browser/xml-formatter.js"></script>

Usage:

const xmlFormatter = require('xml-formatter');

xmlFormat('<root><content><p xml:space="preserve">This is <b>some</b> content.</content></p>');

Using global function xmlFormatter

Page:

<script type="text/javascript" src="dist/browser/xml-formatter-singleton.js"></script>

Usage:

xmlFormatter('<root><content><p xml:space="preserve">This is <b>some</b> content.</content></p>');

Output

<root>
    <content>
        <p xml:space="preserve">This is <b>some</b> content.</p>
    </content>
</root>

License

MIT