The old version javascript may support limited charset, such as old US ASCII or Western European charset. But experienced so many years of development, javascript now can support a wide variety of world languages and their characters.
When you are working with non-European charsets, you may need to make changes to the way your page references external JavaScript(.js) files. Ideally, these .js files should saved in the UTF-8 charset, then they can be used in multi-languages environments.
And the <script> should add an explicit charset define like this:
<script type="text/javascript" src="/somescript.js" charset="utf-8"></script>
If not do this, the script file would be treated as the same charset as the charset define at HTML meta tag.
For example:
If the html charset meta tag is:
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
And the html file use an outer javascript file:
<script type="text/javascript" src="/myscript.js" ></script>
The myscript.js save in ANSI charset, its content:
var ttt="你好";
Now, if you use the variable ttt in the html file, for instance, call alert(ttt), it would show you a garbled alert.
To solve this problem, you can add charset="utf-8" to the script's tag, and re-save the myscript.js in utf-8 charset.
Show the variable:
- Save .js file in UTF-8 charset.
- Add charset="utf-8" to script tag, or use utf-8 as the page's charset.
