Isolate scope variable is undefined - angularjs

Question

For some reason I am not able to access my isolate scope variable "index" in my link function. I have tried both # and = to see if it made any difference and this had no effect, I also tried using a word other than index (in case it was already in use by angular or something) with the same result. Error msg: ReferenceError: index is not defined.
directive:
var jobernizeDirectives = angular.module('jobernizeDirectives', []);
jobernizeDirectives.directive('viewLargeContent', function() {
return {
scope: {
index: '=index'
},
require: 'ngModel',
link: function (scope, el, attrs, ngModel) {
console.log(index);
function openEditor() {
console.log(index);
var main_container = angular.element('.main_container');
var view_frame = angular.element('.view-frame');
console.log(ngModel);
main_container.append('<div class="dimmer"></div>');
main_container.append(
'<div class="large-content' + index + '">'
+ '<textarea>' + ngModel.$viewValue + '</textarea>'
+ '<button>Submit Changes</button>'
+ '</div>'
);
var dimmer = angular.element('.dimmer');
var content_container = angular.element('.large-content' + index);
// content_container.css({ marginTop: (content_container.height()/-2), width: view_frame.width(), marginLeft: (view_frame.width()/-2) })
content_container.css({ height: (0.8*main_container.height()), width: view_frame.width(), marginLeft: (view_frame.width()/-2) })
content_container.find('button').on('click', function() {
var new_content = content_container.find('textarea').get(0).value;
ngModel.$setViewValue(new_content);
content_container.hide();
dimmer.hide();
});
}
// el.on('click', openEditor);
el.on('click', openEditor);
}
}
});
html:
<div data-ng-controller="resumesController">
<div class="row">
<div class="small-12 columns">
<h2>Your Resumes</h2>
</div>
</div>
<div class="row">
<div class="small-12 columns">
<table>
<thead>
<tr>
<th>Name</th>
<th>Category</th>
<th>Date Added</th>
<th>View/Edit Resume</th>
</tr>
</thead>
<tbody>
<tr data-ng-repeat="resume in resumes">
<td>{{ resume.name }}</td>
<td>{{ resume.category }}</td>
<td>{{ resume.date_added }}</td>
<td><button index="le" view-large-content data-ng-model="resume.content">View Resume</button></td>
</tr>
</tbody>
<table>
</div>
</div>
</div>

Answer 1

Index is an attribute of you scope object, so you access it like this:
scope.index
Both '#' or '=' will work, the difference is that '#' will interpolate the value and update the isolated scope when it changes and '=' means Angular should keep the attribute and the isolated scope in sync.
If the variables have the same name you can use the syntactic sugar
scope: {
index: '#'
},
Here is a JSBin with your code.