SWI-Prolog -- get

Documentation
- Reference manual
  - Constraint Logic Programming
    - Attributed variables
      - Attribute manipulation predicates
        
        attvar/1
        
        put_attr/3
        
        get_attr/3
        
        del_attr/2
- Packages

Availability:built-in

get_attr(+Var, +Module, -Value)

Request the current value for the attribute named Module. If Var is not an attributed variable or the named attribute is not associated to Var this predicate fails silently. If Module is not an atom, a type error is raised.

Availability:built-in

[semidet]get_attr(+Elem, +Name, =Value)

[semidet]get_attribute(+Elem, +Name, =Value)

Get an attribute (property) from a JavaScript object. Fails if the attribute is undefined.

Note that this predicate conflicts with SWI-Prolog get_attr/3 to get attributes from a variable. For this reason we also make this predicate available as get_attribute/3.