How to overwrite angular 2 material styles?

问题:

I have this select in angular material:

Its code :

<md-select placeholder="Descuentos y convenios" [(ngModel)]="passenger.discount">
        <md-option [value]="null" [disabled]="true">
            Descuentos
        </md-option>
        <md-option *ngFor="let option of discounts" [value]="option">
            {{ option }}
        </md-option>
        <md-option [value]="null" [disabled]="true">
            Convenios
        </md-option>
        <md-option *ngFor="let option of agreements" [value]="option">
            {{ option }}
        </md-option>
</md-select>

And I would like to have this styles in it:

I tried to put some classes over md-select and md-option, but not worked. I would like to have maybe just an example of how to put the background color or the border and that would give me an idea.

Thank you in advance

回答1:

I think classes should work, but you may need to use /deep/ because of the view encapsulation.

Try this:

/deep/ md-select.your-class {
  background-color: blue;
}

You can also play with theming.

回答2:

If you can solve your style issues with the material 2 scss theming that would be the "right" way hears is a link to there site. https://material.angular.io/guide/theming.

However I used !important on the styles I didn't want materials styles to overwrite.

Here is how I used it:

/*hack to get rid of a scrollbar*/
.cdk-focus-trap-content{
    overflow-x: hidden !important;
}

/*hack to get rid of a padding on the popup*/
.mat-dialog-container{
     padding: 0px !important;
 }

I had a situation where a horizontal scroll bar was showing up in the md-sidenav and I got rid of their default padding on the md-dialog.

Not the most elegant solution but I hope this helps.

This is another StackOverflow question that discusses what !important is.

What does !important in CSS mean?

回答3:

The correct way to change styles of overlay classes like mat-dialog-container is to use panelClass according to Customizing Angular Material component styles:

Add this to your global stylesheet after your theme setup

.myapp-no-padding-dialog .mat-dialog-container {
  padding: 0;
}

Use the following to open the dialog

this.dialog.open(MyDialogComponent, {panelClass: 'myapp-no-padding-dialog'})

回答4:

The top solutions of /deep/, >>> and ::ng-deep are being deprecated and should no longer be used.

The recommended method is now view encapsulation

I used ViewEncapsulation.None to successfully override material table styles within a single component in Angular 6.

On your component:

import { ViewEncapsulation } from '@angular/core';
// ...
@Component({
    // ...
    encapsulation: ViewEncapsulation.None,
})

Here's a great article on the subject

回答5:

You can try adding this code.

.mat-dialog-container{
     padding: 0px !important;
}

If this does not work you can use

/deep/.className {
... your code goes here
}