Node.js 18 : Install2022/08/12 |
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Install Node.js 18.
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| [1] | Confirm the current enabled version of Node.js and Install it. |
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[root@dlp ~]# dnf module list nodejs CentOS Stream 8 - AppStream Name Stream Profiles Summary nodejs 10 [d] common [d], development, minimal, s2i Javascript runtime nodejs 12 common [d], development, minimal, s2i Javascript runtime nodejs 14 common [d], development, minimal, s2i Javascript runtime nodejs 16 common [d], development, minimal, s2i Javascript runtime nodejs 18 common, development, minimal, s2i Javascript runtime Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled # if other versions are enabled, reset once and switch to the version [root@dlp ~]# dnf module reset nodejs [root@dlp ~]# dnf module -y enable nodejs:18
# specify Node.js 18 and install [root@dlp ~]# dnf module -y install nodejs:18/common Dependencies resolved. ============================================================================================= Package Arch Version Repo Size ============================================================================================= Installing group/module packages: nodejs x86_64 1:18.6.0-1.module_el8.7.0+1189+0ca971e9 appstream 13 M npm x86_64 1:8.13.2-1.18.6.0.1.module_el8.7.0+1189+0ca971e9 appstream 1.9 M Installing weak dependencies: nodejs-docs noarch 1:18.6.0-1.module_el8.7.0+1189+0ca971e9 appstream 9.3 M nodejs-full-i18n x86_64 1:18.6.0-1.module_el8.7.0+1189+0ca971e9 appstream 8.0 M Installing module profiles: nodejs/common Transaction Summary ============================================================================================= Install 4 Packages ..... .....[root@dlp ~]# node -v v18.6.0 # verify to create test script
[root@dlp ~]# cat > nodejs_test.js <<'EOF'
var http = require('http');
var server = http.createServer(function(req, res) {
res.write("Hello, This is the Node.js Simple Web Server!\n");
res.end();
}).listen(8080);
EOF
[root@dlp ~]#
node nodejs_test.js & [1] 1954
[root@dlp ~]#
[root@dlp ~]# curl localhost:8080 Hello, This is the Node.js Simple Web Server! kill 1954 |
| [2] | Create a sample WebSocket chat apprication to verify working. |
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[cent@dlp ~]$
npm install fs socket.io express
[cent@dlp ~]$
vi chat.js
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/', function(req, res){
res.sendFile(__dirname + '/index.html');
});
io.on('connection', function(socket){
socket.on('chat message', function(msg){
io.emit('chat message', msg);
});
});
http.listen(1337, function(){
console.log('listening on *:1337');
});
[cent@dlp ~]$
vi index.html
<!DOCTYPE html>
<html>
<head>
<title>WebSocket Chat</title>
</head>
<body>
<form action="">
<input id="sendmsg" autocomplete="off" /><button>Send</button>
</form>
<ul id="messages" style="list-style-type: decimal; font-size: 16px; font-family: Arial;"></ul>
<script src="/socket.io/socket.io.js"></script>
<script src="http://code.jquery.com/jquery.min.js"></script>
<script>
var socket = io();
$('form').submit(function(){
socket.emit('chat message', $('#sendmsg').val());
$('#sendmsg').val('');
return false;
});
socket.on('chat message', function(msg){
$('#messages').append($('<li style="margin-bottom: 5px;">').text(msg));
});
</script>
</body>
</html>
node chat.js listening on *:1337 |
| [3] | Access to the sample apprication to verify it works normally. |
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