I want to read a html, and convert to markdown, but failed

[liu1084]

var html2markdown = require('html2markdown');
var fs = require('fs');
var http = require('http');
http.createServer(function(req, res){
    fs.readFile('index.html',function (err, data){
        if (err) throw new Error(err);

        res.writeHead(200, {'Content-Type': 'text/html','Content-Length':data.length});
        res.write(html2markdown(data));
        res.end();
    });
}).listen(8000);

ERROR:

` L:\github\Java\springmvc-cookbook\cloudstreetmarket-parent\cloudstreetmarket-webapp\src\main\webapp\static\node_modules\html2markdown\markdown_html_parser.js:105 match = html.match( startTag ); ^

TypeError: html.match is not a function at HTMLParser (L:\github\Java\springmvc-cookbook\cloudstreetmarket-parent\cloudstreetmarket-webapp\src\main\webapp\static\node_modules\html2markdown\markdown_html_parser.js:105:19) at html2markdown (L:\github\Java\springmvc-cookbook\cloudstreetmarket-parent\cloudstreetmarket-webapp\src\main\webapp\static\node_modules\html2markdown\html2markdown.js:197:2) at module.exports (L:\github\Java\springmvc-cookbook\cloudstreetmarket-parent\cloudstreetmarket-webapp\src\main\webapp\static\node_modules\html2markdown\index.js:7:10) at L:\github\Java\springmvc-cookbook\cloudstreetmarket-parent\cloudstreetmarket-webapp\src\main\webapp\static\js\html2markdown.js:16:13 at FSReqWrap.readFileAfterClose [as oncomplete] (fs.js:445:3)

`