Options’s Methods:

• bind Call only once when directive is binding.
• update Call every time when expression’s value has been changed.
• unbind Call only once when directive is unbinded.

Directive instance properties:

• $vm Mounted VM of the directive
• $el Mounted target Node of the directive
• $id Current directive instance id
• $scope Repeat directive will create a scope for each item when compiling, your can access “$index”, “$value” through “$scope”.

Example below:

<div z-tap="{onClick}"></div>

Zect.directive('tap', {
    bind: function (result, expression) {
        // do something when init
    },
    update: function (result) {
        // do something when state change or after init
    },
    unbind: function () {
        // do something before destroy the directive instance
    }
})