问题
I am building an angular2 app using angular material2. I am trying to set the background of my application "the correct way", but I can't figure out how.
I found a class I can use on my <body> element: mat-app-background which I can add, that gives me a default color (depending on whether I'm using the light or dark themes).
I wish to define this background color to use my brands' color, but I cannot figure out how to do it.
In _theming.scss it is defined like so:
// Mixin that renders all of the core styles that depend on the theme.
@mixin mat-core-theme($theme) {
@include mat-ripple-theme($theme);
@include mat-option-theme($theme);
@include mat-pseudo-checkbox-theme($theme);
// Wrapper element that provides the theme background when the
// user's content isn't inside of a `md-sidenav-container`.
.mat-app-background {
$background: map-get($theme, background);
background-color: mat-color($background, background);
}
...
}
So I thought it would make sense to try adding the background color to my custom theme, somehow, but I couldn't understand how to do so.
On the Material2 theming documentation it only says:
"In Angular Material, a theme is created by composing multiple palettes. In particular, a theme consists of:
- A primary palette: colors most widely used across all screens and components.
- An accent palette: colors used for the floating action button and interactive elements.
- A warn palette: colors used to convey error state.
- A foreground palette: colors for text and icons.
- A background palette: colors used for element backgrounds. "
How can I add my background to the theme, or do it in any other way?
回答1:
If you want to change the theme's background color for the entire app in a clean way, you can override your theme with the following.
// Set custom background color
$custom-background-color: map_get($mat-blue-grey, 50);
// -or- Can set colour by hex value too
$custom-background-color: #628cc9;
$background: map-get($theme, background);
$background: map_merge($background, (background: $custom-background-color));
$theme: map_merge($theme, (background: $background));
This assumes you have already set up your $theme using mat-light-theme or mat-dark-theme. Of course you can substitute $mat-blue-grey for a color map of your choosing.
Here is a full example of how I am using this. I have the following in a file called theme.scss, which is included in my angular.json "styles" entry:
// Include the common styles for Angular Material. We include this here so that you only
// have to load a single css file for Angular Material in your app.
// Be sure that you only ever include this mixin once!
@include mat-core;
// Define the palettes for your theme using the Material Design palettes available in palette.scss
// (imported above). For each palette, you can optionally specify a default, lighter, and darker
// hue.
$primary: mat-palette($mat-red, 600, 400, 900);
$accent: mat-palette($mat-blue-grey, 500, 200, 700);
$background-color: map_get($mat-blue-grey, 50);
// The warn palette is optional (defaults to red).
$warn: mat-palette($mat-blue);
// Create the theme object (a Sass map containing all of the palettes).
$theme: mat-light-theme($primary, $accent, $warn);
// Insert custom background color
$background: map-get($theme, background);
$background: map_merge($background, (background: $background-color));
$theme: map_merge($theme, (background: $background));
// Include theme styles for core and each component used in your app.
// Alternatively, you can import and @include the theme mixins for each component
// that you are using.
@include angular-material-theme($theme);
@include my-app-theme($theme);
回答2:
edit: This strategy involves replacing Material functionality. for most cases, I would recommend Jake Stoeffler's answer above.
If you want to set the background colors, you likely want to customize the entire background and foreground palette by emulating the mat-light-theme or mat-dark-theme functions with your own replacement. Your replacement would include your own palettes instead of the mat-light-theme-foreground and background palettes.
example: https://stackblitz.com/edit/angular-material-custom-background?file=theme.scss
I don't know if this method is recommended or officially supported.
回答3:
Not exactly answer to your question, but I guess many people will end up here searching for "how to set app background color".
In your project/index.html set your body class to mat-app-background
<body class="mat-app-background">
<app-root></app-root>
</body>
And make sure in your project/angular.json you have:
"styles": [
"./node_modules/@angular/material/prebuilt-themes/YOUR_STYLE.css",
...
],
回答4:
There is also a mixing for colors like this:
.your-class-here {
background: mat-color($mat-grey, 700, 0.9);
}
When looking at angular material components you can assign a color like this.
<md-toolbar color="primary">
</md-toolbar>
That will make your toolbar the color of your primary color.
also make sure to look at _theming.scss file in angular material.
so you can use those mixins to just pull a color from your palette.
回答5:
see : palette theme scss on github Angular (2) Material (2)
Extract of the code:
// Background palette for light themes.
$mat-light-theme-background: (
status-bar: map_get($mat-grey, 300),
app-bar: map_get($mat-grey, 100),
background: map_get($mat-grey, 50),
hover: rgba(black, 0.04), // TODO(kara): check style with Material Design UX
card: white,
dialog: white,
disabled-button: $black-12-opacity,
raised-button: white,
focused-button: $black-6-opacity,
selected-button: map_get($mat-grey, 300),
selected-disabled-button: map_get($mat-grey, 400),
disabled-button-toggle: map_get($mat-grey, 200),
);
// Background palette for dark themes.
$mat-dark-theme-background: (
status-bar: black,
app-bar: map_get($mat-grey, 900),
background: #303030,
hover: rgba(white, 0.04), // TODO(kara): check style with Material Design UX
card: map_get($mat-grey, 800),
dialog: map_get($mat-grey, 800),
disabled-button: $white-12-opacity,
raised-button: map-get($mat-grey, 800),
focused-button: $white-6-opacity,
selected-button: map_get($mat-grey, 900),
selected-disabled-button: map_get($mat-grey, 800),
disabled-button-toggle: map_get($mat-grey, 1000),
);
// Foreground palette for light themes.
$mat-light-theme-foreground: (
base: black,
divider: $black-12-opacity,
dividers: $black-12-opacity,
disabled: rgba(black, 0.38),
disabled-button: rgba(black, 0.38),
disabled-text: rgba(black, 0.38),
hint-text: rgba(black, 0.38),
secondary-text: rgba(black, 0.54),
icon: rgba(black, 0.54),
icons: rgba(black, 0.54),
text: rgba(black, 0.87),
slider-off: rgba(black, 0.26),
slider-off-active: rgba(black, 0.38),
);
// Foreground palette for dark themes.
$mat-dark-theme-foreground: (
base: white,
divider: $white-12-opacity,
dividers: $white-12-opacity,
disabled: rgba(white, 0.3),
disabled-button: rgba(white, 0.3),
disabled-text: rgba(white, 0.3),
hint-text: rgba(white, 0.3),
secondary-text: rgba(white, 0.7),
icon: white,
icons: white,
text: white,
slider-off: rgba(white, 0.3),
slider-off-active: rgba(white, 0.3),
);
回答6:
There is no way to do it "properly" - only workarounds and hacks. Your theme can define primary, secondary, and warn palettes, but not foreground and background palettes. The probable reason why there isn't a direct/easy way to do this in Angular Material is that according to Material Design you shouldn't do this. Color is meant to be used in a specific way to highlight and style various elements according to your theme, but background and foreground colors for plain content is meant to be either dark or light grey - not colored. If you really need to do this, the other suggestions about redefining the background theme or using your own class should be sufficient.
回答7:
I would suggest that you declare a background colour in a variables file (assuming you're using sass) then simply import it where needed. For example:-
@import '../config/variables';
body {
height: 100%;
margin: 0;
background-color: $brand-primary;
}
回答8:
for extra solution if previous didn't work i angular material 2 working with encapsulation style so whatever you gonna do you can't customize angular material component from outside so an ideal solution for that i always use try this
1- you can use this hack that gonna give you possibilities to customize angular material component if you want to by set ViewEncapsulation.None
//test.component.ts
import { ViewEncapsulation } from '@angular/core';
@Component({
selector: 'app-test',
templateUrl: '.....',
styleUrls: ['....'],
encapsulation: ViewEncapsulation.None
})
or
2- if you want just to change background you can simple try this
//style.css (main style file)
html, body {
background-color: #fafafa;
}
this gonna change the whole background color of all your app
来源：https://stackoverflow.com/questions/43919927/angular-material2-theming-how-to-set-app-background