How to call a JavaScript function in another JavaScript file?

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Sometimes, we want to call a JavaScript function in another JavaScript file.

In this article, we’ll look at how to call a JavaScript function in another JavaScript file.

How to call a JavaScript function in another JavaScript file?

To call a JavaScript function in another JavaScript file, we can add script tags.

For instance, we write

<script type="text/javascript" src="1.js"></script>
<script type="text/javascript" src="2.js"></script>

to add script tags.

Then we write

function fn1() {
  alert();
}

in 1.js.

Then in 2.js, we write

fn1();

to call fn1 defined in 1.js.

The scripts are run in the order they’re listed so fn1 is defined before it’s called.

Conclusion

To call a JavaScript function in another JavaScript file, we can add script tags.

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