What are some ways to customize the appearance of a mat-snack-bar template with CSS in Angular Material 7?

I have browsed through various answers, but none of them seem to fully address my specific issue. For instance, this particular answer provides guidance on changing the background color of a snack-bar using CSS, which is helpful. However, attempting to adjust the width of the snack-bar yields no visible results.

Another solution I came across was titled: Overriding Default Style of SnackBar Component, unfortunately, it did not work as expected.

My questions now are:

How can I customize the appearance of a mat-snack-bar template using CSS? Specifically, can you demonstrate how to:

  1. Set the width to 100% when the screen is at full size,
  2. Ensure the snack-bar appears at the top of the page.

You can refer to this example in StackBlitz.

Thank you for your assistance.

htmlcssnotificationsangular-material2snackbar

Answer №1

To easily achieve this effect, CSS is your best friend. Simply add the following code to your CSS file where you define the class (e.g., blue-snackbar):

.blue-snackbar {
  background: #2196F3;
  position: absolute; 
  top: 0;
  left: 0;
  right: 0;
  max-width: 100% !important;
  width: 100%;
}

Let's break down what each part of the code does:

  position: absolute; 
  top: 0;
  left: 0;
  right: 0;

These lines ensure that the snackbar is positioned at the top of the page ("top: 0") and expands to fill the available space (using "position: absolute")

  max-width: 100% !important;
  width: 100%;

The max-width property allows the div to occupy the full width of the webpage, while the width property specifies it should do so. The use of "!important" overrides any conflicting styles from other CSS rules.

Answer №2

To customize mat styles, you need to define your own CSS classes in the style.css file. Otherwise, your changes will not take effect.

Another option is to alter the ViewEncapsulation Mode.

For more information, please refer to Differences between ViewEncapsulation.Native, ViewEncapsulation.None and ViewEncapsulation.Emulated

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