4 The ``default`` filter returns the passed default value if the value is
5 undefined or empty, otherwise the value of the variable:
9 {{ var|default('var is not defined') }}
11 {{ var.foo|default('foo item on var is not defined') }}
13 {{ var['foo']|default('foo item on var is not defined') }}
15 {{ ''|default('passed var is empty') }}
17 When using the ``default`` filter on an expression that uses variables in some
18 method calls, be sure to use the ``default`` filter whenever a variable can be
23 {{ var.method(foo|default('foo'))|default('foo') }}
27 Read the documentation for the :doc:`defined<../tests/defined>` and
28 :doc:`empty<../tests/empty>` tests to learn more about their semantics.
33 * ``default``: The default value