How can I style nested components from their parent in Angular using ::ng-deep?

Simplifying Shadow-Piercing Styling with ::ng-deep in Angular

The need to style nested components from their parent is a common challenge in Angular. While the deprecated /deep/ combinator was once a solution, it is now recommended to use the ::ng-deep selector.

Purpose of ::ng-deep

::ng-deep allows you to pierce through the component encapsulation and apply styles to child components from the parent. This capability is particularly useful when you need to override or complement the child's existing styles.

Syntax and Example

The syntax of ::ng-deep is as follows:

<code class="css">::ng-deep {
  /* Styles to apply to child components */
}</code>

For instance, if you have a parent component with a div element and you want to style the paragraph elements within its child component, you can use the following code:

<code class="html"><div class="parent-div">
  <child-component></child-component>
</div></code>

<code class="css">.parent-div {
  ::ng-deep {
    p {
      color: red;
    }
  }
}</code>

This CSS will override the default color of the paragraph elements in the child component.

IE11 Compatibility

It's important to note that ::ng-deep is not supported by Internet Explorer 11. Therefore, if you are targeting IE11, you may need to explore alternative approaches to shadow-piercing styling, such as wrapping the child component in a div and styling that div instead.

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