This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
Used to specify a set of variable bindings for a rule. This element should be contained within a
rule element and contain one or more
binding elements. This element is optional in Firefox 3/Mozilla 1.9 and later; instead
binding elements may be placed directly inside the
More information is available in the Template Guide.
Inherited from XUL element