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Is it possible that where the "language" of the script is not explicitly defined, the JavaScript will not be executed?
<script type="text/javascript">
This piece of JavaScript which is embedded onto the JSP / HTML page.
The MIME-Type of the file is set by the server. For JS files a MIME-Type of
text/javascriptshould be returned. It’s not doing this here, that’s why you get the notice.The
languageproperty in<script>is deprecated.is correct.
Also see: What is the difference between "lang" and "type" attributes in a script tag?
The MIME-type is a header the server sends along with any file that is requested. The client is free to ignore it of course. Usually if your file is a *.js file your webserver will select the right MIME-type for you, if your file is a .jsp script that returns a JavaScripts file then you will likely need to set the MIME-type header yourself, this is fairly trivial in most languages, I wouldn’t know how to do it in JSP but in PHP it’s: header(“MIME-Type: text/javascript”); anywhere before you start echo’ing the actual content.