When working with Angular, how can I remove an attribute or its value? For example, say I have an ng-click event that I only want to fire once. One approach could be to create a 'self-destruct' in the ng-click event like this:
elementClicked = function(){
//do work
element.ngClick=null;
}
If you simply remove the ng-click attribute, it won't work because the click event listener will still be present. You must set the ng-click binding to null instead.
To address this issue, I developed a custom directive called click-once. This directive captures the element's click event and triggers the ng-click binding only once before removing it.
.directive('clickOnce', function() {
return {
scope: {
'ngClick': '&'
},
link: function(scope, element) {
element.bind('click', function() {
if (scope.ngClick) {
scope.ngClick();
scope.ngClick = null;
}
});
}
}
});
Here is how you can use the directive in your HTML markup:
<button click-once ng-click="doThis()">my button</button>
You can also check out the implementation on jsFiddle.
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