External JS Files

JavaScript FAQ | Basic Syntax & General Questions  

Question: Can I include JavaScript code from external JS files, rather than embedding all my scripts within HTML pages?

Answer: Yes. To do so, create a new file with the extension

.js
, for example,
myscript.js
. Put your JavaScript code in this file; do not include opening and closing
<script>
tags in the
.js
file!

To embed

myscript.js
into your Web page, use these tags in your HTML code:
<script type="text/javascript" src="myscript.js">
</script>
In practice, you may find it convenient to create
.js
files containing JavaScript functions that you reuse on multpile webpages. Usually (but not always) the
<script>
tags specifying the included JavaScript files are placed in the
<head>
section of the page.

Historical note:
Some very old browsers (e.g. Navigator 2.x and Explorer 3.x) could not load external JavaScript files – they simply ignored the

src
attribute.

See also:

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