Angular 2 Material Customize md-menu

Question

I am new to Angular 2 Material and I am trying to customize the style of the md-menu component.

<md-icon class="material-icons" [mdMenuTriggerFor]="menu">dehaze</md-icon>
<md-menu #menu="mdMenu" [overlapTrigger]="false">
  <button md-menu-item>Item 1</button>
  <button md-menu-item>Item 2</button>
</md-menu>

The predefined style settings work fine (e.g. setting the Menu to non-overlapping), but I would like to set the md-menu to 100% width and have a little space between the md-icon button, that expands the menu, which I can not do with the predefined directives from Angular 2 Material.

So far I found a solution with the /deep/ css command, but I read that the command is not supported by the major browsers any more.

What is a good way to customize a Angular 2 Material component? How could I style my md-menu, so that it has 100% width and some space between it´s expanding button?

To illustrate what I am talking about: Draft of the menu

Answer 1

You can pass custom classes to menus.

<md-menu #menu="mdMenu" [overlapTrigger]="false" class="my-full-width-menu">

Then you can target that class with global styles.

For your needs, unfortunately, you'll need to know some information about where your menu overlay is positioned, and hardcode some repositioning

.mat-menu-panel.my-full-width-menu {
  max-width: none;
  width: 100vw;
  margin-left: -8px;
  margin-top: 24px;
}

Plunker Demo

The right way to do this is to create a custom overlay component with material's OverlayModule (current in the material package, but soon to be moved to the cdk).

Answer 2

To style mat-menu without turning off encapsulation for this component you should use 2 classes to increase specificity as exactly as you already did or use !important. However, to make it work you should put them into your global stylesheet so that you will override the default styles.