In programming, a binding
is an association of an identifier
with a value. Not all bindings are variables
— for example, function parameters
and the binding created by the
catch (e)
block are not "variables" in the strict sense. In addition, some bindings are implicitly created by the language — for example,
this
and
new.target
in JavaScript.
A binding is mutable if it can be re-assigned, and immutable otherwise; this does not mean that the value it holds is immutable.
A binding is often associated with a scope . Some languages allow re-creating bindings (also called redeclaring) within the same scope, while others don't; in JavaScript, whether bindings can be redeclared depends on the construct used to create the binding.
Updated on April 20, 2024 by Datarist.