javascript - Why i don't read data at POST -

i learn node , have problem. why don't read data @ post request? when send post @ html, if req.method post work, emmit 'data' doesn't work. part of html:

<form method="post" action='./script.js'> <label for="my-form">enter phraze</label><input type="text" id='my-form'><br> <input type="submit"> </form>  let fs   = require('fs'); let http = require('http');  let server = http.createserver( (req, res) => {    res.setencoding = 'utf8';   res.writehead(200, {'content-type': 'text/html'});    if(req.url == '/'){    reply('./index.html', res)   }   if(req.method == 'post'){    let body;    req.on('data',     (chunk) => { if(chunk != null) {body += chunk.tostring(); res.write(chunk.tostring())} })    req.on('end',     () => res.end(body) )  }  }).listen(5858);  server.on('error', (err) => { throw err.message });  function reply(path, res){   let streampage = fs.createreadstream(path, {encoding: 'utf8'});    streampage.on('readable',     (chunk) => { chunk = streampage.read(); if(chunk != null) res.write(chunk) });   streampage.on('end',     (out) => res.end());   streampage.on('error', (err) => err.message) } 

you send post request script file, it's not correct. should set route server in action field.

<form method="post" action='/'> <label for="my-form">enter phraze</label><input type="text" id='my-form'><br> <input type="submit"> </form> 

something this.