Saxon » SaxonJS

Code committed on Saxon 10.0 dev branch to add the IXSL extension instruction <ixsl:remove-property>. The instruction can be used to remove a named property from a JavaScript object. It has mandatory attribute name (the name of the property to be removed, or dot-separated composite name), and optional attribute object (the object that the property belongs to, or when omitted, the window object is used). i.e. these attributes align with those on <ixsl:set-property>.

ixsl:set-property can be used to set a property to null; but ixsl:remove-property would allow to actually remove own properties from objects. Note that inherited properties can not be removed. This can be implemented using the JavaScript delete operator (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/delete). There is some Saxon-JS 2 implementation detail to work out here about whether we should throw a run time error, or produce a warning, in the cases when either the property doesn't exist, or the property cannot be removed.

Documentation added for Saxon-JS 2 (trunk development branch).