'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.default = doctypeToString;
function doctypeToString(doctype) {
    if (doctype === null) {
        return '';
    }
    // Checking with instanceof DocumentType might be neater, but how to get a
    // reference to DocumentType without assuming it to be available globally?
    // To play nice with custom DOM implementations, we resort to duck-typing.
    if (!doctype || doctype.nodeType !== doctype.DOCUMENT_TYPE_NODE || typeof doctype.name !== 'string' || typeof doctype.publicId !== 'string' || typeof doctype.systemId !== 'string') {
        throw new TypeError('Expected a DocumentType');
    }
    var doctypeString = '<!DOCTYPE ' + doctype.name + (doctype.publicId ? ' PUBLIC "' + doctype.publicId + '"' : '') + (doctype.systemId ? (doctype.publicId ? '' : ' SYSTEM') + (' "' + doctype.systemId + '"') : '') + '>';
    return doctypeString;
}