JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://lm.mdev/lib/jath/jath.js"></script>
<pre>
</pre>

<div id="result"></div>

CSS

.cite {
    font-style:italic;
}

JavaScript

var arrayMethods = Object.getOwnPropertyNames(Array.prototype);

arrayMethods.forEach(attachArrayMethodsToNodeList);

function attachArrayMethodsToNodeList(methodName) {
    NodeList.prototype[methodName] = Array.prototype[methodName];
}

var fb2JathTemplate = {
    metadata: {
        id: '/deff:FictionBook/deff:description/deff:document-info/deff:id',
        epub_version: '2',
        title: '/deff:FictionBook/deff:description/deff:title-info/deff:book-title',
        author: '/deff:FictionBook/deff:description/deff:title-info/deff:author',
        publisher: '/deff:FictionBook/deff:description/deff:publish-info/deff:publisher',
        description: '/deff:FictionBook/deff:description/deff:document-info/deff:history',
        rights: '0',
        language: '/deff:FictionBook/deff:description/deff:title-info/deff:lang',
        pubdate: '/deff:FictionBook/deff:description/deff:title-info/deff:date',
        modified_date: '/deff:FictionBook/deff:description/deff:document-info/deff:date',
        layout: '0',
        spread: '0',
        orientation: '0',
        ncx: '0',
        page_prog_dir: '0',
        active_class: '0'
    },
    manifest: ['//def:item', {
        id: '@id',
        href: '@href',
        media_type: '@media-type',
        properties: '@properties',
        media_overlay: '@media-overlay'
    }],
    spine: ['//def:itemref', {
        idref: '@idref',
        properties: '@properties',
        linear: '@linear'
    }],
    coverLink: '/deff:FictionBook/deff:description/deff:title-info/deff:coverpage/deff:image/@l:href',
    bindings: ['//def:bindings/def:mediaType', {
        handler: '@handler',
        media_type: '@media-type'
    }]
};

Jath.namespaces = {
    def: 'http://www.idpf.org/2007/opf',
    deff: 'http://www.gribuser.ru/xml/fictionbook/2.0',
    dc: 'http://purl.org/dc/elements/1.1/',
    ncx: 'http://www.daisy.org/z3986/2005/ncx/',
    epub: 'http://www.idpf.org/2007/ops',
    xhtml: 'http://www.w3.org/1999/xhtml',
    l:...