How to include a javascript file in a NodeJS project?

L

lavagod2019-08-05 22:22:24

JavaScript

lavagod, 2019-08-05 22:22:24

Good afternoon.
I created calc.js with Jjon.js (parser generator) so got a compiler for the simplest calculator language. In order for the parser to work, you need to run the calc_run.js file in the terminal through NodeJS. The code for the example startup file calc_run.js is very simple, two lines. The code works (answer = 3) if you enter in the terminal: node calc_run.js

var parser = require('./calc.js');
console.log(parser.parse('1+2'));

And now I want to do the same, but through full-fledged NodeJS in the browser. I started a server.js file with settings

var http = require('http'),
    fs = require('fs');

fs.readFile('./calc.html', function (err, html) {
    if (err) {
        throw err; 
    }       
    http.createServer(function(request, response) {  
        response.writeHeader(200, {"Content-Type": "text/html"});  
        response.write(html);  
        response.end();  
    }).listen(8000);
});

i got a calc.html file with a simple structure

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Document</title>
</head>
<body>

  <h1>hello</h1>
  <!-- Как подключить скрипт calc_run.js? -->
    
</body>
</html>

The server starts on port 8000, hello is displayed, but I can’t connect the calc_run.js script. Even inserting the text of the calc.js + calc_run.js scripts into the calc.html document does not work. I really want the example to work not in the console, but on the server. As I understand it, inserting js code into an html document in NodeJS is somehow difficult, through paths, through creating variables for the server, and so on. But I can not find information about this (or I'm looking badly). Who will tell you how to insert calc_run.js into the calc.html document so that the example works and the parser gives a response from the working server under NodeJS?

Reply

Answer the question

In order to leave comments, you need to log in

2 answer(s)

S

Sergey c0re, 2019-08-05
@erge

Scripts are inserted into HTML through the script
tag . But it will not be loaded, because your server can only serve one html page. look at the Express
framework

V

Vitaly, 2019-08-05
@vshvydky

, but through full-fledged NodeJS in the browser.
There are no nodes in the browser
Before practice, study the theory, otherwise it may be funny to others when they read the questions.