ifnot binding

The "ifnot" binding

Purpose

The ifnot binding is exactly the same as the if binding, except that it inverts the result of whatever expression you pass to it- For more details, see documentation for the if binding.

Note: “ifnot” is the same as a negated “if”

The following markup:

<div data-bind="ifnot: someProperty">...</div>

… is equivalent to the following:

<div data-bind="if: !someProperty()">...</div>

… assuming that someProperty is observable and hence you need to invoke it as a function to obtain the current value.

The only reason to use ifnot instead of a negated if is just as a matter of taste: many developers feel that it looks tidier.