JAVASCRIPT FILE
const path = require('path');
const http = require('http');
const fs = require('fs');
const dir = '../frontend/';
const server = http.createServer((request, respond) => {
console.log(request.url);
respond.writeHead(200, {
'Content-Type': 'text/html',
});
const readStream = fs.createReadStream(dir + 'index.html', 'utf-8');
readStream.pipe(respond);
});
const icons = 'icons/';
fs.readdir(icons, (error, files) => {
if (error) throw error;
files.forEach((file) => {
if (path.extname(file) == '.svg') {
// I want to append this filename in the DOM Element.
document.querySelector('.container').innerHTML = file; // Like This
// console.log(file);
}
});
});
server.listen(3000, 'localhost');
HTML File
<div class="container"></div>
Whenever I'm trying to execute above code it gives me an error like this
document.querySelector('.container').innerHTML = file;
^
ReferenceError: document is not defined
at D:\Framework Final\backend\server.js:26:19
at Array.forEach (<anonymous>)
at D:\Framework Final\backend\server.js:23:13
at FSReqCallback.onplete (fs.js:171:23)
Can anyone tell me how can I achieve the same without getting an error.
JAVASCRIPT FILE
const path = require('path');
const http = require('http');
const fs = require('fs');
const dir = '../frontend/';
const server = http.createServer((request, respond) => {
console.log(request.url);
respond.writeHead(200, {
'Content-Type': 'text/html',
});
const readStream = fs.createReadStream(dir + 'index.html', 'utf-8');
readStream.pipe(respond);
});
const icons = 'icons/';
fs.readdir(icons, (error, files) => {
if (error) throw error;
files.forEach((file) => {
if (path.extname(file) == '.svg') {
// I want to append this filename in the DOM Element.
document.querySelector('.container').innerHTML = file; // Like This
// console.log(file);
}
});
});
server.listen(3000, 'localhost');
HTML File
<div class="container"></div>
Whenever I'm trying to execute above code it gives me an error like this
document.querySelector('.container').innerHTML = file;
^
ReferenceError: document is not defined
at D:\Framework Final\backend\server.js:26:19
at Array.forEach (<anonymous>)
at D:\Framework Final\backend\server.js:23:13
at FSReqCallback.onplete (fs.js:171:23)
Can anyone tell me how can I achieve the same without getting an error.
Share Improve this question asked Apr 25, 2021 at 14:28 Kunal TanwarKunal Tanwar 1,2911 gold badge12 silver badges30 bronze badges 5- 2 Simply, you cannot. There is no DOM on the server, just a plain html source file. – Bergi Commented Apr 25, 2021 at 14:39
- 1 The "DOM" is the "Document Object Model", which is an in-memory representation of the HTML elements that were parsed by the browser. Node isn't a browser and so there is no DOM API available. – Scott Marcus Commented Apr 25, 2021 at 14:40
- 1 Seems you are looking for some serverside HTML templating language, that allows you to dynamically generate HTML pages, e.g. with a list of icons from an array in them. – Bergi Commented Apr 25, 2021 at 14:41
- @Bergi Yes! exactly this is what I need! Could you suggest any? – Kunal Tanwar Commented Apr 25, 2021 at 15:44
- @KunalTanwar No, I dont want to suggest any. But with that search term, you'll find many libraries on the web, and can choose the one that you like best (for your particular use case) yourself. – Bergi Commented Apr 25, 2021 at 15:55
4 Answers
Reset to default 8The error above is very explicit:
document is not defined
document is not exist in Node (e.g. server) environment, it's exist only in browser.
You will need to use separate library to parse your HTML file in order to do queries like querySelector('.container') and etc.
Libraries to take a look (as an example):
https://github./taoqf/node-fast-html-parser
https://github./cheeriojs/cheerio
In NodeJS, the document Object doesn't exist. You can't access DOM-Nodes or anything in the DOM in NodeJS.
NodeJS is serverside Javascript.
If you want any data from the client, you have to add client-side code and send the data from the client to the server. This is done with a post-request. In the Backend, you have to setup a server with routes. To setup a server in NodeJS, use Express (frequently used). Google about it.
Node.js is server side, the document doesn't exist. So the Dom doesn't exist. You need to try with client web browser side. I mean simply just create a web page document
But you can also check this answer for more information
stackoverflow./questions/34309557/how-to-access-dom-using-node-js
I had an issue similar to this. I was working whit Jest tests and some of the tests have to manipulate DOM elements. What it works for me was install JSDOM and follow instructions of basic usage. JSDOM
npm i jsdom
After that, when I run the test It shows me this error:
node:internal/modules/cjs/loader:1183
return process.dlopen(module, path.toNamespacedPath(filename));
^
Error: The module '\\?\C:\Users\pc\node_modules\canvas\build\Release\canvas.node'
was piled against a different Node.js version using
NODE_MODULE_VERSION 72. This version of Node.js requires
I am not sure if it is because I am using a Windows, but I just installed canvas:
npm install canvas
(In fact in the JSDOM doc file on Git Hub It talks about that) JSDOM
In my case It show me some high severity vulnerabilities so I just run:
npm audit fix
If that doesn't resolve the issue, you need to force it:
npm audit fix --force
after that it shows me successful and I was able to use the JSDOM as it is specified in the JSDOM info page.
I hope this information helps you!