angular-conditional-validation


Angular conditional validation module
=====================================

The conditional validation module provides an enableValidation attribute directive that can be used to conditionally enable/disable validation for elements with an ngModel directive.



Motivation
----------

Most (if not all) of the standard Angular validators can be disabled individually using falsy values.
For example when the expression for a ngMin attribute evaluates to undefined, then validation will be disabled for the min validator.
However, this requires that the logic that determines when validation should be enabled is combined with the logic that defines the values for parameterized validators.
At best you can write something like this:

``html
type="date"
ng-model="myCtrl.startDate"
ng-min="myCtrl.enableStartDateValidation && myCtrl.minStartDate">
`

The enableValidation directive provides a cleaner method to separate the logic.
When applied to the example above, the result looks like this:

`html
ng-model="myCtrl.startDate"
ng-min="myCtrl.minStartDate"
enable-validation="myCtrl.enableStartDateValidation">
`

Using the enableValidation directive it also easier to disable multiple validators at once.
If the example above is extended with a max validator, you can simply add the ng-max attribute without having to repeat myCtrl.enableStartDateValidation && in the validator expression.
The result:

`html
ng-model="myCtrl.startDate"
ng-min="myCtrl.minStartDate"
ng-max="myCtrl.maxStartDate"
enable-validation="myCtrl.enableStartDateValidation">
`

Another reason for using the enableValidation directive is when you use (custom) validators that do not provide a method to (conditionally) disable them.



Installation
------------

NPM

`
npm install angular-conditional-validation
`

Bower

`
bower install angular-conditional-validation
`


Usage
-----

To use the Angular conditional validation module in your application either include the script (angular-conditional-validation(.min).js) using a