XPath and XSLT Support
XSLT support is available in all XML files that declare the XSLT-Namespace
http://www.w3.org/1999/XSL/Transform on their root element.
WebStorm lets you evaluate expressions against the currently focused document, including support for the
document() function to make cross-document queries. You can also evaluate an expression against multiple XML documents in the Find in Path style using the Find by XPath action.
You can configure to highlight matching expressions in the current editor or to show a list of matching lines in the Find. Editing XPath expressions is enhanced by on-the-fly error-checking including a set of customizable XPath Inspections and a wide range of code completion suggestions.
WebStorm also lets you display a unique XPath expression for a selected element in the editor by choosingfrom main menu.
XSLT support is not limited to XPath expressions, it also supports a wide range of XSLT constructs, like checking the existence of templates that are called via
xsl:call-template and their parameters, refactoring and navigation enhancements.