The [c:]transform-text standard attribute can be used to normalize text nodes in an XCST module. This can be useful when whitespace is used on text only for readability, or when text is included from an external file. This attribute affects descendant text nodes, and can be specified on any element to override an attribute specified in an ancestor element.
Normalization affects text nodes children of elements whose content model is sequence constructor (including literal result elements), it does not affect other text nodes, e.g. text in a c:script element.
None
Normalization can be disabled using [c:]transform-text='none', which is the default.
Normalize Space
When [c:]transform-text='normalize-space' is used on an element, descendant text nodes are modified by removing leading and trailing whitespace, and sequences of internal whitespace are reduced to a single space character.
It is a compilation error to use [c:]transform-text='normalize-space' on a text value template.
Example: CSS Minification
The following example uses normalize-space normalization for minification purposes, which has the desired effect as long as the text does not contain significant whitespace.
<style c:transform-text='normalize-space'>
<![CDATA[
a {
text-decoration: none;
}
]]>
</style>
<!-- Outputs:
<style>a { text-decoration: none; }</style>
-->
Trim
When [c:]transform-text='trim' is used on an element, descendant text nodes are modified by removing leading and trailing whitespace.
Example: Removing Indentation Before and After an Included Text Node
The following example uses trim normalization on an included text node, to avoid outputting the leading and trailing whitespace of the code indentation.
<script c:transform-text='trim'>
<xi:include href='js/global.min.js' parse='text'/>
</script>