substring-before
The substring-before function returns a string that is the part of a given string before a given substring.
Syntax
substring-before( haystack, needle )
Parameters
Return value
A string.
Examples
| XPath Example | Output |
|---|---|
substring-before('aa-bb','-') |
aa |
substring-before('aa-bb','a') |
(empty string) |
substring-before('aa-bb','b') |
aa- |
substring-before('aa-bb','q') |
(empty string) |
Specifications
Gecko support
Supported.