Exploring the isolated scopes of AngularJS directives

Exploring directives in AngularJS led me to this interesting code snippet:

var app = angular.module('app', []);
//custom directive creation
app.directive("myDir", function () {
return {
        restrict: "E",
        scope: {
     title: '@'
 //= two-way binding

I have a few questions:

In the provided code, the 'scope' attribute seems to create either a child scope or an isolated scope. How can I specify which type of scope I want for this directive? If I only want a child scope but not an isolated one, how would I achieve that?

Does 'isolated' mean that the created scope cannot access variables from the parent scope?

By default, a parent scope cannot access variables from a child scope, but if the child scope is not isolated, can it access parent variables?

Lastly, if we define a 'controller' attribute to assign a controller to this directive, will the directive automatically inherit the controller's scope?

Thank you!

Answer №1

To create a new child scope that is not isolated, use scope: true.

According to the documentation on angular-js:

scope

If set to true, a new scope will be generated for this directive. If multiple directives on the same element require a new scope, only one new scope will be created. The creation of a new scope does not apply to the root of the template as it always receives a new scope.

If set to {} (object hash), an "isolate" scope is created. The 'isolate' scope is different from regular scope in that it does not inherit prototypically from the parent scope. This is beneficial when developing reusable components that should not inadvertently access or modify data in the parent scope.

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