Implement a method within a directive

Question

Implement a method within a directive

Check out my custom Angular directive code below, which generates div elements:

function footerDirective($compile){
     return { 
         link: function(scope,elements,attributes){

             function createDiv(content,cname,callback){
                var new_div=document.createElement("div"); 
                new_div.setAttribute("ng-click", callback);
                $compile(new_div)(scope);
                new_div.innerHTML=content;
                new_div.className=cname;
                elements[0].appendChild(new_div); 
             }

     for (var i=0;i<5;i++) {
       createDiv(i,"class-numbers","gallery.clickPage()");
     }
}}}

In the code snippet above, gallery.clickPage refers to a Controller method. It functions properly as is. However, I am trying to pass i as an argument into gallery.clickPage, like so:

gallery.clickPage.bind(this,i)

Unfortunately, when I attempt to pass this into the createDiv function, it does not work. How can I make this modification successfully?

javascript angularjs

Answer 1

Answer №1

The correct approach is to include the following in the template:

<div ng-repeat="mydiv in mydivs" ng-click="gallery.clickPage($index)">{{mydiv.content}}</div>

And in the directive:

scope.mydivs = [{content : 1}, {content : 2}, ...]

To address your question: the i you mentioned is phantom - it doesn't exist when the page is viewed, only during its creation by Angular. Therefore, you can't pass it directly. Instead, you can do something like this:

createDiv(i,"class-numbers","gallery.clickPage(" + i + ")")

;

Alternatively, you could assign the values of i to the scope: scope.myVars = [1, 2, 3, 4, 5]

createDiv(i,"class-numbers","gallery.clickPage(myVars[" + i + "])")

;

A final important point to note is that if you wish to create an Angular element, you can simply do so like this:

angular.element('<div ng-click="someF()">{{anything}}</div>')

, then compile and append it to the parent element.

Answer 2

The correct approach is to include the following in the template:

<div ng-repeat="mydiv in mydivs" ng-click="gallery.clickPage($index)">{{mydiv.content}}</div>

And in the directive:

scope.mydivs = [{content : 1}, {content : 2}, ...]

To address your question: the i you mentioned is phantom - it doesn't exist when the page is viewed, only during its creation by Angular. Therefore, you can't pass it directly. Instead, you can do something like this:

createDiv(i,"class-numbers","gallery.clickPage(" + i + ")")

;

Alternatively, you could assign the values of i to the scope: scope.myVars = [1, 2, 3, 4, 5]

createDiv(i,"class-numbers","gallery.clickPage(myVars[" + i + "])")

;

A final important point to note is that if you wish to create an Angular element, you can simply do so like this:

angular.element('<div ng-click="someF()">{{anything}}</div>')

, then compile and append it to the parent element.

Answer 3

Answer №2

Consider utilizing the following approach:

 for (let i=0; i<5; i++) {
   createDiv(i, "class-numbers", "gallery.clickPage(" + i + ")");
 }

If 'i' is only a number, it can be passed as shown above, resulting in HTML like gallery.clickPage(1), and so on.

This will effectively pass 1

Answer 4

Consider utilizing the following approach:

 for (let i=0; i<5; i++) {
   createDiv(i, "class-numbers", "gallery.clickPage(" + i + ")");
 }

If 'i' is only a number, it can be passed as shown above, resulting in HTML like gallery.clickPage(1), and so on.

This will effectively pass 1

Implement a method within a directive

Answer №1

Answer №2

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