Create angular material theme with CSS variables
I created a little library to make this a little easier.
You can use it like so:
Install:
npm i angular-material-css-vars -S
Then remove any existing
@import '~@angular/material/theming';
from your main stylesheet file.Add this to your main stylesheet instead:
@import '~angular-material-css-vars/main'; @include initMaterialCssVars();
Change the main theme color like so:
import {MaterialCssVarsService} from 'angular-material-css-vars'; export class SomeComponentOrService { constructor(public materialCssVarsService: MaterialCssVarsService) { const hex = '#3f51b5'; this.materialCssVarsService.changePrimaryColor(hex); } }
If you upgrade to @angular/material 7.3.4 CSS Variables will mostly work. Only riples and other stuff that uses opacity will need a little fix. I use rgba() for my project, but it should also work for hsla()
Include this:
@function mat-color($palette, $hue: default, $opacity: null) {
@if type-of($hue) == number and $hue >= 0 and $hue <= 1 {
@return mat-color($palette, default, $hue);
}
$color: map-get($palette, $hue);
@if (type-of($color) != color) {
@if ($opacity == null){
@return $color;
}
// Here is the change from the original function:
// If the $color resolved to something different from a color, we assume it is a CSS variable
// in the form of rgba(var(--rgba-css-var),a) and replace the 'a' value.
@return #{str-slice($color, 0, str-index($color, ',')) + $opacity + ')'};
}
@return rgba($color, if($opacity == null, opacity($color), $opacity));
}
directly after:
@import '~@angular/material/theming';
and define your colors like this:
--primary-color-50-parts: 0,158,224;
// ... all other colors
$color-primary: (
50: rgba(var(--primary-color-50-parts), 1),
// ... all other colors
);
if you define your colors in the map like this:
50: hsla(var(--primary-color), 90%, 98%, 1);
then you need to change str-index($color, ',') in the sass function to something that finds the last ',' in the string. Unfortunatelly my sass knowledge covers only the bare minimum and I don't know how to do that :/
I created a little library - material-theme-creator
You can theming your angular-application or use this approach to create themes
NPM: https://www.npmjs.com/package/material-theme-creator
DOCS: https://artik-man.github.io/material-theme-creator/
npm i material-theme-creator
@import "~material-theme-creator/ngx-mtc";
@import '~@angular/material/theming';
@include mat-core();
@include ngx-mtc-init();
$primary-map: ngx-mtc-create-theme-map('primary');
$accent-map: ngx-mtc-create-theme-map('accent');
$warn-map: ngx-mtc-create-theme-map('warn');
:root {
--is-dark-theme: 1; // Is dark theme? 1 or 0;
@include ngx-mtc-theme-base(); // Creates base colors
// Creates theme colors
@include ngx-mtc-create-variables-from-color('primary', #009688, 38%);
@include ngx-mtc-create-variables-from-color('accent', #2196f3, 57%);
@include ngx-mtc-create-variables-from-color('warn', #f44336, 62%);
}
// Creates Angular Material Theme
@include angular-material-theme(
ngx-mtc-custom-theme(
mat-palette($primary-map),
mat-palette($accent-map),
mat-palette($warn-map)
)
);
The second theme code:
.second-theme {
--is-dark-theme: 0;
@include ngx-mtc-update-theme('primary', #142148, 45%);
@include ngx-mtc-update-theme('accent', #658e14, 50%);
@include ngx-mtc-update-theme('warn', #750101, 50%);
}
You can use it with Angular Material or SCSS or pure CSS