In an attempt to transfer a variable from one JavaScript file to another, I encountered an issue. The first JavaScript file contains the following:
var x = "sachin";
Unfortunately, my other JavaScript file is unable to access the value of the x variable. How can I resolve this so that I can access the x variable and its value in another file?
For further information, check out details on local and global variables. http://www.w3schools.com/js/js_scope.asp.
Ensure that your variable X is not enclosed within a function and that your file is being loaded in the correct sequence.
<script src="file1.js"><script> //declare var x=1 here
<script src="file2.js"><script> // you can access x from here.
Having a variable in global scope allows it to be accessed from any javascript file.
Your initial js script
//initial.js file
var globalVariable={
name: 'John'
};
Next, include your second js code
//second.js file
alert(globalVariable.name);
Lastly, on the html page insert-
<script type="text/javascript" src="initial.js"></script>
<script type="text/javascript" src="second.js"></script>
Assuming you are coding in a browser environment using JavaScript, the order in which you include your script files is crucial for proper functionality. Placing the script tags incorrectly could lead to issues like...
<script src="file2.js"></script>
<script src="file1.js"></script>
If file1 defines variable x, it will not be accessible in file2 because file2 is loaded and executed before file1.
There are a couple of straightforward methods to achieve this, such as declaring the variable as global or placing it within a shared namespace between both files.
If you opt to make it global (though not recommended), you can do so by:
window.y = "john";
To incorporate the variable into a common namespace (bearing in mind that this namespace is also global), follow these steps:
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