what is node in javascript code example

Example 1: what is node.js

Javascript was always a client side language until node.js.
Common server side languages include PHP, Python, Perl, Ruby
and several more. Node enables you to use Javascript server side.
This now means you can have a consistent language both ends
which could not be done prior to Node.

Example 2: what is node

npm install http then write a webserver...
const http = require('http');
const PORT = 3000;

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello World');
});

server.listen(port, () => {
  console.log(`Server running at PORT:${port}/`);
});

Example 3: node.js

When you install Node.js, you can do these things:
Make web servers
Run JavaScript without an HTML file
...and more!

Example 4: WHAT IS NODE IN DOM

<html>
  <head>
    <title>DOM Tutorial</title> 
  </head>
  <body> 
    <h1>DOM Lesson one</h1> 
    <p>Hello world!</p> 
  </body> 
</html>

Example 5: what is a node

Is a child of EventTarget
Node = DOM objects =  Attr, CharacterData (which Text, Comment, and CDATASection are all based on), ProcessingInstruction, DocumentType, Notation, Entity, and EntityReference.
function isNode(o){
  return (
    typeof Node === "object" ? o instanceof Node : 
    o && typeof o === "object" && typeof o.nodeType === "number" && typeof o.nodeName==="string"
  );
}

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