Passing parameters to javascript script in xslt

Question

Is it possible to handle a parameter to a javascript function in XSLT where the script is between tags <script type=text/javascript>....</script>. If possible could someone give a example. Thanks.

Do you want to generate <script>...</script> or to call a javascript function during the transformation and use the result of this call further in the transformation? — Dimitre Novatchev
– Dimitre Novatchev, Commented Apr 27, 2012 at 12:21

freefaller · Accepted Answer · 2012-04-28 13:43:41Z

2

I think you're getting confused between the two things: XSLT is something that is used (in this case) to generate HTML/javascript - once that generated HTML/javascript is received by the browser then the javascript can be run. I'm unaware of any such concept of the XSLT "passing" a variable to a javascript function.

My guess is you want something like this XSLT...

<script type="text/javascript">
  var myVar = "<xsl:value-of select="XPATHVALUE"/>";
  <xsl:text disable-output-escaping="yes"><![CDATA[
    function myFunc(){
      alert(myVar);
    }
  ]]></xsl:text>
</script>

If you put the main "body" of the javascript within the xsl:text element, it means you won't get caught out using reserved characters (such as < > etc).

The generated HTML/javascript that is set to the browser would end up as something like this, meaning calling myFunc would display "hello world"...

<script type="text/javascript">
  var myVar = "hello world";
    function myFunc(){
      alert(myVar);
    }
</script>

Update

As MichaelKey has highlighted, the <xsl:text> element above is unnecessary. This should produce the same thing...

<script type="text/javascript">
  var myVar = "<xsl:value-of select="XPATHVALUE"/>";
  <![CDATA[
    function myFunc(){
      alert(myVar);
    }
  ]]>
</script>

edited Apr 28, 2012 at 13:43

answered Apr 27, 2012 at 9:03

freefaller

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4 Comments

Michael Kay Over a year ago

You shouldn't need the disable-output-escaping. The serializer knows it's producing a script element and should handle the content accordingly (if it doesn't, it's a bug).

freefaller Over a year ago

I didn't realise that. I will give it a go without, but if memory serves me correctly Visual Studio (where I do all my XSLT work) starts showing formatting errors, so I wouldn't have even tried to run it

freefaller Over a year ago

@MichaelKay As you say, the <xsl:text> element is unnecessary, but you still need to use <![CDATA[..]]> otherwise the translation attempted by .NET does not like reserved characters such as &, < and >

freefaller Over a year ago

Oops - didn't notice comments don't require escaping... that should be "such as &, < and >"

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