The power of AngularJS lies in its ability to create

Question

The power of AngularJS lies in its ability to create

I have been studying AngularJS directives and found a valuable resource at this link: Directives

One particular example that caught my attention is about: Creating Directives that Communicate

As I was going through the code snippet in script.js, I stumbled upon this line:

title: '@' // Line 33 in script.js

The issue is that I am unsure of what this line signifies; I understand that 'title' is an isolated scope property, but the symbol '@' is puzzling me. Previously, I learned that:

'=' indicates when the attribute name is equal to its value

```
'=info' assigns 'info' as the attribute
```

However, the documentation provided in the given link does not clarify the meaning of the symbol '@'. My assumption is that when '@' is used, the value assigned to the 'title' property corresponds to the title attribute's value. If anyone can shed light on this concept, I would greatly appreciate it. Thank you all and have a wonderful day.

javascript angularjs

Answer 1

Answer №1

@ is a unique type of binding called isolated scope (similar to =). Unlike =, the @ parameter only retrieves the attribute's value without establishing a two-way data binding with the outer scope.

When you need to use a value in a directive that remains constant throughout its instance, choosing @ is ideal.

For example, if you wished to specify a color for a directive template:

<my-color-box color="blue"></my-color-box>

You can utilize the attribute in the directive like this:

app.directive('myColorBox', function() {

   return {
      restrict: E,
      scope: {
         color: '@'
      },
      template: '<div style="background-color: {{color}}"></div>'
   }
});

Answer 2

@ is a unique type of binding called isolated scope (similar to =). Unlike =, the @ parameter only retrieves the attribute's value without establishing a two-way data binding with the outer scope.

When you need to use a value in a directive that remains constant throughout its instance, choosing @ is ideal.

For example, if you wished to specify a color for a directive template:

<my-color-box color="blue"></my-color-box>

You can utilize the attribute in the directive like this:

app.directive('myColorBox', function() {

   return {
      restrict: E,
      scope: {
         color: '@'
      },
      template: '<div style="background-color: {{color}}"></div>'
   }
});

The power of AngularJS lies in its ability to create

Answer №1

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