Access Global variable from a .js file
Question
HTML file :
<HTML>
<HEAD>
<Title>Testing</Title>
</HEAD>
<Body>
<script src="Test.js" language="JavaScript" type="Text/JavaScript" >
CreateVariables();
document.write(glVarMsg3);
</script>
</Body>
</HTML>
.js file:
function CreateVariables()
glVarMsg3="Global variable";
Friends please inform me what is the issue in this script? why i can't be able to access variable from .js file?
3 answers
solution1
2 ACCPTED 2014-03-31 07:19:07
Firstly, that's invalid syntax for declaring a function. You need braces:
function CreateVariables() {
glVarMsg3="Global variable";
}
Secondly you can either set an src or script content, but not both. So you'd need:
<script src="Test.js"></script>
<script>
CreateVariables();
console.log(glVarMsg3);
</script>
A good place to start would be this MDN article on functions. Additionally, I hope this is just for learning/testing as the use of document.write and global variables in this way is discouraged.
solution2
1 2014-03-31 07:21:48
Just define your variables in global.js outside a function scope:
// global.js
var global1 = "I'm a global!";
var global2 = "So am I!";
// other js-file
function testGlobal () {
alert(global1);
}
solution3
0 2014-03-31 07:26:14
first just import
<script src="Test.js">
</script>
after use
<script>
CreateVariables();
document.write(glVarMsg3);
</script>
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