Create global variable in jQuery outside document.ready function?

JavascriptWeb DevelopmentObject Oriented Programming

To create a global variable, you need to place variable inside the <script> </script> tag. Following is the code −

Example

 Live Demo

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initialscale=1.0">
<title>Document</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
</head>
<body>
<button
onclick="createGlobalVariable()">checkGlobalVariable</button>
<script>
   var globalVariable;
   $(document).ready(function() {
      function initializeGlobalVariable() {
         globalVariable = [{
            "name":"John",
            "age":23
         }];
      }
      initializeGlobalVariable();
   });
   function createGlobalVariable() {
      if (globalVariable.length) {
         console.log('The Global variable name
         is='+globalVariable[0].name+" The Global variable age is="+globalVariable[0].age);
      }
   }
</script>
</body>
</html>

To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.

Output

This will produce the following output −

When you click on the button checkGlobalvariable, the following output will be visible −

raja
Published on 07-Sep-2020 07:32:00
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