Module name "mysql" has not been loaded yet for context: _. Use require([])
Question
I am new to javascript language. I have created an application in Bluemix. To this application I have attached SQL database service. From the applications index.html, I am trying to call function "TryConnect()" which has the logic to connect to the SQL database. Below is the implementation of TryConnect:
this.TryConnect = function(){
var mysql = require("mysql");
var conn = mysql.createConnection({
host: "127.0.0.1",
user: "user",
password: "password",
database: "SQL Database-ox"
});
conn.connect(function(err){
if(err){
console.log("Error connecting to DB");
return;
}
console.log("Connection Established");
});
}
upon running this I am getting below error:
Uncaught Error: Module name "mysql" has not been loaded yet for context: _. Use require([])
My index.html looks like this:
<!DOCTYPE html>
<html>
<head>
<title>NodeJS Starter Application</title>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="stylesheets/style.css">
<script data-main="db" src="require.js" ></script>
<script type="text/javascript" src="db.js" ></script>
<script type="text/javascript">
function ConnectToMySQL(){
alert("connect");
TryConnect();
alert("connect end");
}
</script>
</head>
<body>
<table>
<tr>
<td style= "width:30%;">
<img class = "newappIcon" src="images/Calendar.jpg">
<td>
<h1>Hello!</h1>
<p>Welcome to Calendar sync application.
This application synchronizes all your events, meetings and favourites.
</table>
<input type="button" onClick="ConnectToMySQL()" value="Connect to DB"/>
</body>
</html>
3 answers
solution1
1 2015-10-13 05:41:58
Module name "mysql" has not been loaded yet for context: _. Use require([])
Because on your code:
var mysql = require("mysql");
Quick Fix
Do what the error asks you:
require(["mysql"],function(mysql){
/// your code
});
Long term
This and other things are discussed here : http://requirejs.org/docs/start.html
Recommend using define in the long term.
solution2
0 2015-10-13 06:51:17
Please include node.js which will have "mysql" declaration so when you use require("mysql") javascript engine loads the deceleration from the given libraries.
Please refer to below links.
solution3
0 2022-06-06 04:07:38
Try adding this to your code, it worked for me :
webPreferences: {
nodeIntegration: true,
contextIsolation: false
}
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